| No. | First | Last | Hometown | ST | CO | Machine | Sponsors |
| 1 | Chad | Reed | Kurri Kurri | AU | Kawasaki KX 450F | Monster Energy Kawasaki | |
| 5 | Ryan | Dungey | Belle Plain | MN | US | Suzuki RMZ 450 | Rockstar Makita Suzuki, Yoshimura, Dunlop, Maxima |
| 8 | Grant | Langston | Durban | ZA | Yamaha YZ 450F | Langston Motorsports | |
| 10 | Thomas | Hahn | Decatur | TX | US | Suzuki RMZ 450 | Rockstar Energy Drink, Suzuki, Canidae, One Industries, Dragon, Dunlop, Pro Circuit |
| 23 | Justin | Brayton | Ft. Dodge | IA | US | Yamaha YZ 450F | Muscle Milk, Toyota, JGRMX |
| 24 | Brett | Metcalfe | Mannum | AU | Honda CRF450R | Geico Powersports Honda | |
| 27 | Nicholas | Wey | DeWitt | MI | US | Kawasaki KX 450F | Monster Energy Kawasaki |
| 29 | Andrew | Short | Smithville | TX | US | Honda CRF450R | Honda Red Bull Racing |
| 32 | Kyle | Cunningham | Ft. Worth | TX | US | Yamaha YZ 450F | Valli Motorsports, Rockstar, Yamaha, GYTR, Yamalube, Dunlop |
| 33 | Josh | Grant | Riverside | CA | US | Yamaha YZ 450F | Muscle Milk, Toyota, JGRMX |
| 35 | Matthew | Goerke | Lake Helen | FL | US | Yamaha YZ 450F | MotoConcepts, Yamaha, O'Neal, FMF |
| 40 | Jake | Moss | Sussex Inlet | AU | Suzuki RMZ 450 | Rockstar Energy Drink, Suzuki, Canidae, One Industries, Dragon, Dunlop, Pro Circuit | |
| 41 | Kyle | Regal | Kemp | TX | US | Honda CRF450R | Merge Racing, American Honda, Fly Racing, WPS, Oakley, Jo Jo Clothing, Twin Air |
| 42 | Ben | Evans | Boise | ID | US | Kawasaki KX 450F | Tilube, Brown Motorsports, Carl's Cycle, DR.D, Fly Racing, RK Excel, Factory Connection, Dunlop, Scott USA, Truth, Faction MX, EVS |
| 43 | Steven | Clarke | West Midlands | GB | Suzuki RMZ 450 | Suzuki City, RG3 | |
| 46 | Ryan | Sipes | Vine Grove | KY | US | Yamaha YZ 450F | MotoConcepts Yamaha, O'Neal,, FMF |
| 55 | Kyle | Chisholm | Valrico | FL | US | Yamaha YZ 450F | MotoConcepts,, Yamaha, O'Neal,, FMF |
| 58 | Weston | Peick | Wildomar | CA | US | Yamaha YZ 450F | FMF, Fox Racing Shox, Fly Racing, Roost MX, Dunlop, Yamalube |
| 71 | Kyle | Summers | TX | US | Yamaha YZ 450F | Valli Motorsports, Yamaha, FMF, AXO, Arai, Dunlop | |
| 79 | Justin | Sipes | Vine Grove | KY | US | Kawasaki KX 450F | Warthog Racing, Gateway Cycles, Troy Lee Designs, eleven10mods, Scott USA, Alpinestars, Dunlop, Jardine Exhaust, Tilube, PR2, |
| 88 | Ricky | Renner | Lakeland | FL | US | KTM 450 XC | Munn Racing KTM, RGCRacing.com, Troy Lee Designs, Active-Ride Suspension, Dunlop, TCX, Uni Filter, Hot Cams, Vertex, Engine Ice, Vortex, RK, Excel, ICW, PJ1, Asterisk, Fuel, 1onWon, Renner Racing |
| 101 | Ben | Townley | Taupo | NZ | Honda CRF450R | Troy Lee Designs, Lucas Oil, Honda, Red Bull | |
| 122 | Daniel | Reardon | Queensland | AU | Yamaha YZ 450F | Valli Motorsports, Rockstar Yamaha, GYTR, Yamalube, Dunlop | |
| 134 | Travis | Sewell | Westville | IN | US | Yamaha YZ 450F | mxtime.com, Rock River Yamaha, MSR, Scott USA, Factory Connection, EVS, TLR Performance, LeoVince, MGX Unlimited, Dunlop, Wiseco, Pro Taper, Boyesen, DeVol Engineering, Sunset Ridge MX |
| 163 | David | Nichols | Everett | WA | US | Kawasaki KX 450F | Bellevue Kawasaki, Fox Racing, CP Pistons, NoToil, Fusion Graphixx, DR.D, MB1 Suspension |
| 167 | Ryan | Mills | Clintondale | NY | US | KTM 450 SX-F | Powered By Regina, Moroney's Cycle, Moose Racing, Jardine Exhaust, Utopia, Z1R, Dunlop, EVS, TCX, Trix Stix, Two Brothers Hardscapes |
| 184 | Dennis | Stapleton | Capitola | CA | US | Honda CRF450R | Self |
| 196 | Tyler | Wharton | Pilot Point | TX | US | Honda CRF450R | Tisco, Nacco, Honda West, DR.D, Vortex, Silkolene, KN Filters, Dunlop, Shoei, MSR, ICW, SDG, EBC, Cycra, Spy, Hyde Racing, CMA, TCX, Gamble Guest Care, DeCal Works, |
| 201 | Cameron | Rodriguez | Apple Valley | CA | US | Honda CRF450R | Cosworth Pistons, Jardine Exhaust, Schmidt Performance, Tubliss, Dunlop, MSR, Scott USA, EVS, Hinson |
| 204 | David | Gassin | Pioneer | CA | US | Yamaha YZ 450F | Self |
| 209 | Heath | Harrison | Silverhill | AL | US | Kawasaki KX 450F | FMF, MSR, Smith, NXT, Roost MX, Vanquish, Zak Mashburn MX, Tilube, JGR, Pro Taper |
| 220 | Todd | Bannister | Colorado Springs | CO | US | Honda CRF450R | Rocky Mountain Cycle Plaza, BAM Motors, Spy, |
| 222 | Chris | Howell | Spokane Valley | WA | US | Yamaha YZ 450F | Specialty, DeVol Engineering, DR.D, Fly Racing, Asterisk, Bridgestone, Pro Wheel, Leatt Brace, Wiseco |
| 226 | Devin | Brassfield | Aurora | CO | US | Honda CRF450R | Self |
| 229 | Jeff | Loop | Claremont | CA | US | Kawasaki KX 450F | Confused Clothing, Fly Racing, Scott USA, Jardine Exhaust, DeCal Works, Vertex, Vortex, JBC, Pro Wheels, Hot Cams |
| 236 | Sean | Kranyak | Bakerfield | CA | US | Yamaha YZ 450F | Bell, Von Zipper, Answer, L&M |
| 241 | Derek | Anderson | Arvada | CO | US | Kawasaki KX 450F | Dupree1, Vickery Motorsports, Team Green, Hart Roofing, Novik, DeVol Engineering, Rhino Stand, VC Graphix, Pro Circuit, Bel-Ray, Shoei, Fox Racing, Performance Cycle |
| 247 | Teddy | Parks II | Princeton | TX | US | Kawasaki KX 450F | TP Racing,, WPS, Fly Racing, Precision Sprockets, Vertex,, MX Designz, Scott USA, Enzo Suspension, Dunlop, Gateway Cycles, Jardine Exhaust, Trackmasters, Bogard MX Schools, All Seal |
| 251 | Joshua | Clark | North Franklin | CT | US | Kawasaki KX 450F | Factory Connection, Fly Racing, ASV, Spectro Oils, X-Pro, |
| 300 | Kurtis | Manderscheid | Maquoketa | IA | US | Yamaha YZ 450F | UFO, Baker Boys Yamaha, O'Neal, Gaerne, EVS, Dunlop, Factory Backing, Scott, FMF, Works Connection, Hinson, MotoSport, B&E Machine, |
| 309 | Spencer | Dally | Taylors Falls | MN | US | Suzuki RMZ 450 | Blaine Brothers, Warthog Racing, Confused Clothing, Pro Circuit, DeCal Works, Factory Connection, Motorex, Village Bank |
| 317 | Richard | White | Ashland | PA | US | Kawasaki KX 450F | O'Neal, Bel-Ray, Scott USA, Holeshot Cycle, Whitey Wash |
| 333 | Derek | Kemp | Arlington | TX | US | KTM 450 SX-F | Munn Racing KTM, KTM Talk, Maxima, Gold Key Computer System, Waco Foundation and Repair, Hensel Electric, Tucker Rocky, Marshall's Racing, Factory Connection |
| 345 | Mark | Graddy | Ft. Worth | TX | US | Kawasaki KX 450F | Self |
| 389 | Jeffrey | Fisher | Lubbock | TX | US | Kawasaki KX 450F | Self |
| 440 | Lee | Witt | San Jose | CA | US | Yamaha YZ 450F | Self |
| 466 | Kerry | Moore | Sanger | TX | US | Honda CRF450R | Self |
| 472 | Tony | Sherman | Elverta | CA | US | Yamaha YZ 450F | Self |
| 482 | Cory | Green | Nowata | OK | US | Kawasaki KX 450F | Silkolene, Renthal, Utopia, Triple Effect, Reynard Mods, Wiseco, Complete Nutrition, US Highlands, No Fear |
| 571 | Coby | Adair | Aztec | NM | US | Kawasaki KX 450F | Fun Center, Kawasaki Team Green, MSR, Pro Taper, Subway, Factory Connection, Novik Gloves, Factory Backing, Acerbis, Pro Turf Solutions, AJ Constructions, Pro Circuit, Tucker Rocky, Couder Consulting |
| 574 | Jarrett | Kovacs | Palmdale | CA | US | Honda CRF450R | Self |
| 589 | Joey | Olson | Littleton | CO | US | Kawasaki KX 450F | G-Force Powersports,, Oakley, Troy Lee Designs, Precison Powersports, Swink Racing, Olson Training Camps |
| 635 | Travis | Stichter | Thornton | CO | US | Kawasaki KX 450F | MotoAdventure Kawasaki, Bruce Dalton, KSR Racing, LSE Racing, Oury Grips, Easton EXP, Shawn Smith, Pirelli Tires |
| 641 | Kody | Bill | Caldwell | IA | US | Yamaha YZ 450F | Self |
| 646 | Derek | Overton | Waxahachie | TX | US | Kawasaki KX 450F | Self |
| 685 | Bret | Pike | Pueblo | CO | US | KTM 450 SX-F | Self |
| 693 | Tucker | Saye | Littleton | CO | US | Suzuki RMZ 450 | Stamans Suzuki, Race Daye Performance, AAKTive Satellite, GNARbar energy, Novik Gloves, One Industries, Scott USA, Gaerne, Sunline, SixSixOne, Pirelli, Hinson, Twin Air, Derek Anderson Racing |
| 707 | Alexander | Millican | Rockwall | TX | US | Yamaha YZ 450F | LCS Racing,, Shannon Niday MX School, Asterisk, Dunlop, Hinson, Rock River Powersports, FMF, Warthog Racing, Tucker Rocky |
| 712 | Matt | Moss | Sussex Inlet | AU | Suzuki RMZ 450 | Rockstar, Makita, Suzuki, Yoshimura, Dunlop, Maxima | |
| 716 | Nathan | Hensley | Dolores | CO | US | Suzuki RMZ 450 | Fun Center, Answer, RG3, Factory Effex, Works Connection, Sunline, Subway, Pirelli, Pro Circuit, Twin Air, RK Chain, Alpinestars, Asterisk, Dragon |
| 751 | Austin | White | Litchfield Park | AZ | US | Honda CRF450R | Self |
| 764 | Roman | Morozov | Krimsk | RU | Kawasaki KX 450F | Self | |
| 766 | Sergey | Astaykin | Moscow | RU | Kawasaki KX 450F | Self | |
| 768 | Cole | Shondeck | Colorado Springs | CO | US | Yamaha YZ 450F | Self |
| 771 | Terren | ODell | Gentry | AR | US | Yamaha YZ 450F | Rock River Motorsports, Fly Racing, FMF, Utopia, Wiseco, No Toil, GYTR, Speed Grafix, Tag Metals |
| 774 | Robby | Marshall | Stow | MA | US | Kawasaki KX 450F | Keene Motosports, North Racing, Moto Nut, Factory Connection, TSS Graphics, Kenny G Performance Tuning, ICW, Spectro Oils, Bell |
| 776 | Aron | Harvey | Carson City | NV | US | Yamaha YZ 450F | Mettec, Novick Gloves, McCoys Offroad, DR.D, Hinson, Fox Racing |
| 784 | Brett | Cue | Kremlin | OK | US | Honda CRF450R | DeCal Works, Scott USA, Reynard Modifications, No Fear, Works Connection |
| 786 | Chad | Jorgensen | Alpine | WY | US | Suzuki RMZ 450 | Self |
| 788 | Matthew | VonLinger | Stanford | KY | US | Kawasaki KX 450F | Gateway Cycles, Daniel Boone MX, Fly Racing, Acerbis, Leatt Brace, Dragon, Bridgestone, Hinson, Enzo Racing, Sunline, Jardine Exhaust, Moto Hose, Shoei, Link Ink, Gaerne, OccumedexUSA, Panic Rev MX, Silkolene, |
| 790 | Robert | Imondi | Rifle | CO | US | Honda CRF450R | Self |
| 800 | Mike | Alessi | Victorville | CA | US | KTM 350 SXF | Jagermeister, KTM, Motorex, Renthal, FLU, RK, Excel, DT1, Dunlop, WP |
| 812 | Luke | VonLinger | Stanford | KY | US | Kawasaki KX 450F | Gateway Cycles, Jardine Exhaust, Vertex, Hot Cams, Acerbis, Braking, RK Chain, SDG, Silkolene, Hinson, Vortex, Daniel Boone MX, Moto Hose, Fly Racing, eleven10mods, Dragon, Shoei, Gaerne, Leatt Brace, Longshot Racing, DeVol Engineering, |
| 816 | Rustin | Meyer | Colorado Springs | CO | US | Honda CRF450R | Self |
| 862 | Ozzy | Barbaree | White Hall | AR | US | Suzuki RMZ 450 | Self |
| 864 | Austin | Haught | St. Johns | MI | US | Honda CRF450R | GPF, Championship Powersports, Factory Connection, No Fear, Dunlop, DeCal Works, Renthal, Yoshimura, Excel, Spy, Works Connection |
| 888 | Hunter | Meyer | Colorado Spring | CO | US | Honda CRF450R | Self |
| 936 | Logan | Melton | Arlington | TX | US | Honda CRF450R | Silkolene, Braking, Factory Effex, Boyesen, Twin Air, SLM Racing, Osiris, Donnie Elmer Racing, Gaerne, Works Connection, RK Chain, EVS, ASV, Smith, Pro Taper, FMF, Answer, Altus Motorsports, Racer X, Hinson, Pirelli, Moto Hose |
| 939 | Cole | Mort | Glendive | MT | US | Kawasaki KX 450F | Self |
| 940 | Matthew | Karlsen | Denver | CO | US | Yamaha YZ 450F | Self |
| 958 | Aden | de Jager | Shell Harbour | AU | Kawasaki KX 450F | Ohlins, Biketique, Gateway Cycles, Jardine, Fly Racing, Silkolene, Honolulu Hills Raceway, Stomp Grip, Kwala Grips, Kali Protectives, Hammerhead Designs, No Toil, DeVol Engineering, DeCal Works, Goodridge, Skullcandy | |
| 964 | Derek | Stephens | Henderson | NV | US | Kawasaki KX 450F | Matson Motocross, BS Racing, Barnett Clutches, Thousand Oaks Kawasaki, Enzo Suspension, Afterburnner MX, O'Neal,, Dragon, Cycle Gear, Longshot Racing |
| 983 | Ricardo | Chacon | Alajuela | CR | Kawasaki KX 450F | MotoAdventure Kawasaki, Pro-Action, Two Rivers Racing, Moose Racing, Klim | |
| 984 | Gerald | Gonzalez | Alajuela | CR | Kawasaki KX 450F | MotoAdventure Kawasaki, Pro-Action, Two Rivers Racing, Moose Racing, Klim | |
| 992 | Ryan | Rozinski | Dillon | CO | US | Kawasaki KX 450F | Self |
| No. | First | Last | Hometown | ST | CO | Machine | Sponsors |
| 12 | Jake | Weimer | Rupert | ID | US | Kawasaki KX 250F | Monster Energy Pro Circuit Kawasaki |
| 17 | Justin | Barcia | Ochlocknee | GA | US | Honda CRF250R | Geico Powersports Honda |
| 19 | Tommy | Searle | Pembury | GB | KTM 250 SXF | FMF, KTM, Motorex, Renthal, FLU, RK, Excel, DT1, WP, Dunlop | |
| 20 | Broc | Tickle | Holly | MI | US | Yamaha YZ 250F | Yamaha, Star Racing, DNA Shred Stix |
| 21 | Blake | Wharton | Pilot Point | TX | US | Honda CRF250R | Geico Powersports Honda |
| 28 | Tyla | Rattray | Durban | ZA | Kawasaki KX 250F | Monster Energy Pro Circuit Kawasaki | |
| 31 | Matthew | Lemoine | Collinsville | TX | US | Suzuki RM Z250 | Suzuki City, RG3, Moose Racing, Parts Unlimited, Shoei |
| 36 | Darryn | Durham | Butler | PA | US | Honda CRF250R | Honda of Troy |
| 38 | Trey | Canard | Shawnee | OK | US | Honda CRF250R | Geico Powersports Honda |
| 45 | Austin | Stroupe | Lincolnton | NC | US | Kawasaki KX 250F | Rockstar, Makita, Suzuki, Yoshimura, Dunlop, Maxima |
| 48 | Max | Anstie | Newbury Park | GB | Yamaha YZ 250F | Yamaha, Star Racing, Division 7 | |
| 49 | William | Hahn | Decatur | TX | US | Honda CRF250R | Troy Lee Designs, Lucas Oil, Honda |
| 50 | Alex | Martin | Millville | MN | US | Honda CRF250R | Spring Creek MX Park, Husker Offroad, Warthog Racing, Merge Racing, TiLube, Underground MX, Pro Circuit, Fly Racing, Shoei, Dunlop, Vortex, Rental, Twin Air, Scott USA, Gaerne, UFO, DP Brakes, QTM, SDG, Leatt Brace, RK Excel, Works Connection |
| 61 | Vince | Friese | Cape Girardeau | MO | US | Yamaha YZ 250F | MotoConcepts, Yamaha, O'Neal, FMF |
| 66 | Blake | Baggett | Grand Terrace | CA | US | Suzuki RM Z250 | Rockstar Energy Drink, Suzuki, Canidae, One Industries, Dragon, Dunlop, Pro Circuit |
| 85 | Scott | Champion | Sun City | CA | US | Kawasaki KX 250F | Revolution2M, Blonix, Dunlop, Enzo, Works Connection, No Fear, Ride Inc., Barnett, UFO, |
| 87 | Les | Smith | York | SC | US | Honda CRF250R | Honda of Troy, Kilbarger Racing, Fox Racing, Dunlop, Cti2, Hammerhead Designs |
| 92 | Michael | Willard | Thornville | OH | US | Honda CRF250R | Honda of Troy |
| 97 | Robert | Fitch Jr. | Denver | CO | US | Kawasaki KX 250F | Sun, Team Green Kawasaki, Absolute Race Technology, Fly Racing, Scott USA, Dunlop, Two Brothers Racing, Absolute Graphics, Leatt Brace, Active 8, Novik, KalGuard, Wiseco, Woodys Wheel, RPJ Energy, Delkevic, Sunline, ACC, |
| 102 | Christopher | Gosselaar | Victorville | CA | US | Honda CRF250R | Self |
| 108 | Dean | Wilson | Glasgow | Scot | GB | Kawasaki KX 250F | Monster Energy, ProCircuit, Kawasaki |
| 126 | Hunter | Hewitt | Pilot Point | TX | US | Suzuki RM Z250 | Rockstar Energy Drink, Suzuki,, Canidae, One Industries, Dragon, Dunlop, Pro Circuit |
| 133 | Myles Martin | Tedder | Surfside | CA | US | Kawasaki KX 250F | Monster Energy Kawasaki, Thor |
| 140 | Johnny | Moore | Madison | MS | US | Honda CRF250R | Got Gear Motorsports, Road Runner Transports, Fly Racing, JGR, EVS, Sunstar, Advanced Electric, Roost MX, Zak Mashburn MX Schools, Ankle-Savers, FMF, Smith, TCX, |
| 160 | Corey | Pennington | Santa Cruz | CA | US | Kawasaki KX 250F | Team Green Kawasaki, Fox Racing, Pro Circuit, Shankers Vodva, Knobby Shop, Dunlop, 180 Decals, Renthal, Hinson, Ogio, Excel Rims, Talon Hubs, Acerbis, Oakley |
| 166 | Dakota | Tedder | Surfside | CA | US | Kawasaki KX 250F | Monster Energy Kawasaki |
| 180 | Doug | Leavitt | Littleton | CO | US | KTM 250 SX-F | Self |
| 185 | Killy | Rusk | Aztec | NM | US | KTM 250 SX-F | Rusk Racing Decals, LeoVince, TCX, Cosworth Pistons, Troy Lee Designs, Tilube, RK Chain, Three Brothers Racing,, Utopia, No Toil, Motorex, Dunlop, KTM, KTM Factory Services |
| 191 | Jared | Van Bebber | Placeville | CA | US | Kawasaki KX 250F | Self |
| 200 | Cole | Seely | Newbury Park | CA | US | Honda CRF250R | Troy Lee Designs, Lucas Oil, Honda, |
| 208 | Donald | Vawser | Kimberly | ID | US | Kawasaki KX 250F | Self |
| 211 | Tevin | Tapia | Federal Way | WA | US | KTM 250 SXF | Munn Racing KTM, Cycle Nation Powersports, FMF, Dunlop, No Fear, Spy, Renegade Race Fuels, TCX, Boyesen, Moto X Nutrition, |
| 225 | Tyler | McEwen | Quincy | IL | US | Honda CRF250R | TNT Action Sports, MSR, Dunlop, Utopia, Factory Connection, HRP, Twin Air, Renthal, TLR, Yoshimura, Liquid Performance, Two2Cool, Acerbis, Leatt Brace, CTi, Gaerne |
| 228 | Lance | Phillips | Gig Harbor | WA | US | Honda CRF250R | O'Neal, DeVol Engineering, FMF, Dunlop, Scott, Thomas MX Schools, Hot Cams, Monster, Excel, ODI, Pit Posse, PBI, Gaerne, EVS, Wiseco, Boyesen, SDG, Fusion Graphix, Cometic, Acerbis, Ogio, Pivot Works, IMS, Hinson |
| 243 | Eli | Tomac | Cortez | CO | US | Honda CRF250R | Geico Powersports Honda |
| 246 | Mike | Henderson | Littleton | CO | US | Yamaha YZ 250F | Self |
| 268 | Bryce | Shondeck | Colorado Springs | CO | US | KTM 250 SX-F | Self |
| 308 | Nicholas | Jackson | Zumbrota | MN | US | Honda CRF250R | Tousley Motorsports, Todd Jackson Trucking, Black Diamond MX, Pro Circuit, Enzo Racing, Pro Taper, Utopia, ESR Mods, Shoei, Motorex, Vaiths, New Image Windows, Outpost Bar, Dunlop, Bobs Cycle Supply, Jackson Moto Compound |
| 313 | Derek | Rogers | Ellijay | GA | US | Yamaha YZ 250F | Roost MX, EVS, Factory Connection, Kicker, Dunlop, Scott USA, Fly Racing, RTMX, Gaerne, East Side Cycles, DSR Racing, Rogers Contracting, |
| 329 | Chad | Gores | Anaheim | CA | US | Honda CRF250R | California Coast Plumbers,, Tokyo Mods, No Fear, AC Racing |
| 339 | Michael | Thacker | Ft. Worth | TX | US | Honda CRF250R | Tisco, Nacco, Honda West, DR.D, Vortex, Silkolene, KN Filters, Dunlop, Shoei, MSR, ICW, SDG, EBC, Cycra, Spy, Hyde Racing, CMA, TCX, Gamble Guest Care, DeCal Works, |
| 341 | Nico | Izzi | St. Claire | MI | US | Yamaha YZ 250F | Yamaha, Star Racing, Division 7 |
| 354 | Christopher | Johnson | Ramona | CA | US | Suzuki RM Z250 | Self |
| 357 | Jake | Locks | Dixon | CA | US | Yamaha YZ 250F | Self |
| 370 | Drew | Yenerich | New Lenox | IL | US | Yamaha YZ 250F | Yamaha, Fox Racing Shox, Answer, FMF, Von Zipper, TLR, GYTR, Yamalube, Vertex,, Hot Cams, Hot Rods, Vortex, Tag Metals, Renegade Race Fuels, Dunlop, K&N, Champion Tool Storage, EVS, Yeti Cycles, SRAM, Mellow J |
| 374 | Cody | Gilmore | Spencer | IA | US | Kawasaki KX 250F | Husker Offroad, Yankton Motorsports, FC Mods, Warthog Racing, DeCal Works, DR.D, Vertex, Hot Cams, Utopia, Dunlop, Motion Pro, Pilot Financial, Confused Clothing |
| 377 | Christophe | Pourcel | Marseille | FR | Kawasaki KX 250F | Monster Energy Pro Circuit Kawasaki | |
| 394 | Tanner | Moore | Auburn | KS | US | KTM 250 SX-F | Self |
| 447 | Deven | Raper | Murrieta | CA | US | Honda CRF250R | Self |
| 470 | Ricky | LaMontagne | Erie | CO | US | Honda CRF250R | None |
| 505 | Sean | Lipanovich | Cairo | GA | US | Honda CRF250R | American Honda, Performance Honda, No Fear, Pro Circuit, Alpinestar, Bell, Factory Backing, Vortex, Dunlop, Scott USA, MTF EVS, UFO, Boyesen, Hinson, Braking, IMS, Pit Posse, Klotz, Hot Heads Design, No Toil, 2-Fast Racing |
| 521 | Kyle | Gills | Wiggins | MS | US | Kawasaki KX 250F | Pro Flow Motorsports, Fly Racing, Smith, JM Racing, Liquid Performance, Pro Circuit, EVS, Pirelli, Paul Bryant Sales and Service, Cycle Service Plus |
| 534 | Travis | Freistat | Escondido | CA | US | KTM 250 SX-F | Self |
| 565 | Preston | Mull | Livingston | CA | US | Honda CR250R | Self |
| 577 | Martin | Davalos | Quito | EC | Yamaha YZ 250F | Yamaha, Star Racing, Division 7 | |
| 585 | Travis | Baker | Temecula | CA | US | Yamaha YZ 250F | MotoConcepts Yamaha, O'Neal, FMF, Motorex |
| 588 | Jerry | Lumsden III | Dallas | TX | US | Honda CRF250R | Self |
| 592 | Jake | Canada | Sun City | CA | US | Kawasaki KX 250F | Self |
| 659 | Justin | Freund | DeSoto | MO | US | Kawasaki KX 250F | S & S Kawasaki, Euro Suspension, Source Graphics, Yoshimura, Scott USA, Parts Unlimited, |
| 667 | Austin | Schott | Evergreen | CO | US | Honda CRF250R | No Fear, Mechanix Wear, Renthal, 180 Decals, Colorado Powersports |
| 679 | Adam | Fink | Oakley | CA | US | Yamaha YZ 250F | Self |
| 708 | Chris | Spiers | Aptos | CA | US | KTM 250 SX-F | Pinit Motorsports, Airtec, Knobby Shop, Von Zipper, Gaerne, Bell, MSR, 180 Decals, KTM Factory Services |
| 745 | Charles | Whittelsey | Wildomar | CA | US | Honda CRF250R | Self |
| 750 | Jared | Hicks | Irvington | AL | US | Kawasaki KX 250F | Mobile Cylce Center, Pro-Flow Kawasaki, Carey PT, Moto-Tech, Pro-Circuit, Sea Worthy Yaucht Management, Kames Sports |
| 756 | Trevor | Monks | Colorado Springs | CO | US | Honda CRF250R | R.E. Monks Construction, MCR Motorsports, eleven10mods, PR2, Cernic's |
| 765 | Michael | Giese | Sedalia | CO | US | Yamaha YZ 250F | Vickery Motorsports, Pro Taper, Dunlop, FMF, Spy, Bell, Answer, MB1, Regina Chains, Acerbis |
| 793 | Yuta | Ikegaya | Yaizu City | Shizuoka | JP | Suzuki RM Z250 | Self |
| 804 | Jason | Langford Jr. | Dallas | TX | US | Kawasaki KX 250F | Mx Designs, Tim Shea, Barr Comp, Dunlop |
| 829 | Richard | Draper | Bellvue | NE | US | Honda CRF250R | Storm Lake Honda, PinpointCard.com, American Payment Systems, theOilMart.com, Amsoil, Vortex, Tamer, AXO, LeoVince, UFO, EVS, Pro Wheel, Fusion Graphixx, Troy Lee Helmets, Smith, Works Connection, Engine Ice, Dunlop |
| 834 | Hunter | Clements | Weston | MO | US | Honda CRF250R | Donnell's Motorcycles, Crower Performance, Vitamin Water, Shoei, TCX, Fly Racing, Scott USA, SourceMX Graphics, JM Racing, Yoshimura |
| 918 | Michael | Akaydin | Louisville | KY | US | Kawasaki KX 250F | FCA MX, Gateway Cycles, Tom Zont Racing, Fly Racing, VMX Graphics, eleven10mods, OccumedexUSA, Jardine Exhaust, Silkolene, UFO, Vortex, Dragon, Sunline, Braking, Engine Ice, Horseshoe Bend MX, Moto Hose, MXwebsites.com |
| 946 | Mac | James | Tacoma | WA | US | Honda CRF250R | Self |
| 978 | Brandon | Brower | Sandy | UT | US | Kawasaki KX 250F | Nazzise Racing, Good Times Powersports, Pro-Action, Fly Racing, Scott USA, Ryno Designs, Local Hero, One 9D Crew, Ballz Racing |
| 985 | Alejandro | Rojas | Alajuela | CR | Kawasaki KX 250F | MotoAdventure Kawasaki, Pro-Action, Two Rivers Racing, Moose Racing, Klim | |
| 991 | Branden | Miller | Fisherville | TN | US | Kawasaki KX 250F | Joes Cycle Shop,, Team Green Kawasaki, Motorex, FMF, Factory Connection, Liquid Performance, CTI,, Scott USA, Wiseco, Renegade Racing Fuel, Sunstar, Braking, Dunlop, One Industries, Works Connection, Ride Engineering, EVS, Smallwood's Trailers, Answer, ICW, Ankle-Savers |
| No. | First | Last | Hometown | ST | CO | Machine | Sponsors |
| 1 | Ashley | Fiolek | St. Augustine | FL | US | Honda CRF250R | Honda Red Bull Racing |
| 2 | Jessica | Patterson | Tallahassee | FL | US | Yamaha YZ 250F | Yamaha, Star Racing, Division 7, DNA Shred Stix |
| 4 | Sara | Price | Canyon Lake | CA | US | Kawasaki KX 250F | Monster Energy Kawasaki |
| 5 | Elizabeth | Bash | Lake Elsinore | CA | US | Honda CRF250R | Tisco Racing |
| 6 | Vicki | Golden | Temecula | CA | US | Yamaha YZ 250F | Self |
| 7 | Sarah | Whitmore | Cheboygan | MI | US | KTM 250 SX-F | Jagermeister, FMF, KTM Racing |
| 9 | Penni | Cyrus | Queen Creek | AZ | US | Kawasaki KX 250F | Self |
| 10 | Jacqueline | Strong | Sedona | AZ | US | Yamaha YZ 250F | Schakemoto, Fox Racing, Strong Cryogenics, Mana Strength and Conditioning, Merge Racing, Rekluse, Utopia, FMF, Major Motion, Snap Fitness, Dunlop, D&K Service, Adam's Chiropractic |
| 12 | Tatum | Sik | Murrieta | CA | US | Yamaha YZ 250F | Warthog Racing, Pant Saggin Dezigns, Pro-Tec, Cernic's, MSR, Maxxis, Jardine Exhaust, Alpinestars, Nitro Circus, Utopia, Factory Backing |
| 13 | Ashley | Boham | Loveland | CO | US | Kawasaki KX 250F | Self |
| 15 | Sayaka | Kaneshiro | Horimizo City | Osaka | JP | Suzuki RM Z250 | Self |
| 17 | Jackie | Ives | Exeter | CA | US | Yamaha YZ 250F | D&E Yamaha, DT1 Airfilter, Pro Star, Pro Tech Coatings, Tulare Cycle Park, Mesquite Custom Karts, Warthog Racing, FMF, Grants Air Conditioning, Robert Marks Plumbing, Visalia Countertop Designs, Mark Ives Landscape, Utopia |
| 18 | Tarah | Geiger | Winter Garden | FL | US | Honda CRF250R | Self |
| 19 | Nicole | Madsen | Taft | CA | US | Yamaha YZ 250F | Self |
| 20 | Hailey | Larson | Mill Valley | CA | US | Yamaha YZ 250F | Self |
| 21 | Danielle | Sawicki | Petoskey | MI | US | Kawasaki KX 250F | Self |
| 22 | Julie Anne | Parizek | Willington | CT | US | Kawasaki KX 250F | Cyr Racing |
| 24 | Tressa | Rau | Sidney | MT | US | Honda CRF250R | Rau Designs, Mondak Motorsports, Jerry Z Repair, B&G Productions, B&B Builders, Mort Distributing, Dittus Construction |
| 28 | Lindsey | Scheltema | Byron Center | MI | US | Kawasaki KX 250F | Warhawk MX, Smith, Fox Racing |
| 30 | Lindsey | Palmer | Conifer | CO | US | Honda CRF250R | Autoflex |
| 35 | Lauren | Volentir | Thornton | CO | US | Kawasaki KX 250F | Self |
| 37 | Christina | Reed | Morrison | CO | US | Yamaha YZ 250F | Self |
| 49 | Jenica | Paulsen | Camdenton | MO | US | Yamaha YZ 250F | Self |
| 51 | Erica | Cook | Natalia | TX | US | Yamaha YZ 250F | Self |
| 54 | Alexah | Pearson | Rocklin | CA | US | Yamaha YZ 250F | Rock River Powersports |
| 55 | Taryn | Covington | Magnolia | AR | US | Honda CRF250R | CFC Racing, Scott USA, Fly Racing, EVS, FMF, Mary Kay Cosmetics, PROSKIN, RideOn Bike Shop, Butler Chiropractic |
| 57 | Denaye | Giroux | Moose Jaw | SK | CA | Yamaha YZ 250F | Schrader's Yamaha |
| 60 | Shelbie | Brittain | Rockwall | TX | US | Kawasaki KX 250F | JM Racing, Scott USA, Granbury Motorsports, Speed Graffix, FMF, Fly Racing, SAM |
| TBA | Kim | Irmgartz | DE |
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