2021 Monster Energy AMA Supercross Championship
Arlington 3 (West) - 250SX West Heat 1 Results
AT&T Stadium
Arlington, TX US 
March 20, 2021
250SX West Heat 1 Results
| Rider | Time | Interval | Best Lap | Hometown | Bike | |
|---|---|---|---|---|---|---|
| 1 |  Cameron McAdoo | 9 Laps | 0:49.937 | Sioux City, IA  | Kawasaki KX250 | |
| 2 |  Jarrett Frye | +12.354 | 0:51.855 | Mechanicsville, MD | Yamaha YZ250F | |
| 3 |  Coty Schock | +16.221 | 0:52.062 | Dover, DE | Honda CRF250R | |
| 4 |  Nate Thrasher | +17.214 | 0:51.277 | Livingston, TN | Yamaha YZ250F | |
| 5 |  Carson Mumford | +22.595 | 0:52.204 | Simi Valley, CA | Honda CRF250R | |
| 6 |  Dominique Thury | +29.060 | 0:52.729 | Schneeberg  | Yamaha YZ250F | |
| 7 |  Cheyenne Harmon | +32.188 | 0:53.560 | Ovilla, TX | Yamaha YZ250F | |
| 8 |  Derek Kelley | +34.339 | 0:52.858 | Riverside, CA | GasGas MC 250F | |
| 9 |  Calvin Fonvieille | +34.920 | 0:53.632 | Lescure d'Albigeois | KTM 250 SX-F | |
| 10 |  Dustin Winter | +36.560 | 0:53.673 | Clearwater, KS | Yamaha YZ250F | |
| 11 |  Gared Steinke | +54.907 | 0:55.140 | Woodland, CA | Kawasaki KX250 | |
| 12 | Garrett Hoffman | 8 Laps | 0:55.956 | Clermont, FL | Yamaha YZ250F | |
| 13 |  Jerry Robin | +00.234 | 0:54.105 | Hamel, MN | Husqvarna FC 250 | |
| 14 |  Mason Wharton | +03.604 | 0:55.520 | Brush Prairie, WA | Kawasaki KX250 | |
| 15 |  Matthew Hubert | +03.837 | 0:54.878 | Riverside, CA | Kawasaki KX250 | |
| 16 |  Logan Leitzel | +04.120 | 0:54.837 | Dillsburg, PA | Kawasaki KX250 | |
| 17 |  Corbin Hayes | +29.113 | 0:54.872 | Folsom, CA | Husqvarna FC 250 | |
| 18 |  Garrett Marchbanks | 3 Laps | 0:51.995 | Coalville, UT | Yamaha YZ250F | |
| 19 |  Mitchell Harrison | +DNS | Lansing, MI | Honda CRF250R | ||
| 20 |  Jordon Smith | +DNS | Belmont, NC | Kawasaki KX250 |
