Schnellster Fahrer bi dem im Rahmen des Thunder Valley National absolvierten Zeittraining der Klasse 250MX war Ty Masterpool.
Der Kawasaki-Pilot Australien umrundete die Rennstrecke in Lakewood, Colorado, in 2:16.262 Minuten und war damit gerade einmal drei Hundertstelsekunden zügiger unterwegs als Red-Plate-Inhaber Haiden Deegan (Yamaha), der sich Rang zwei in der Zeitentabelle sicherte. Chance Hymas (Honda), Jo Shimoda (Honda) und Tom Vialle (KTM) komplettierten die Liste der fünf schnellsten Fahrer.
250MX Zeittraining
1. Ty Masterpool (KAW), 2:16.262
2. Haiden Deegan (YAM), 2:16.290
3. Chance Hymas (HON), 2:16.507
4. Jo Shimoda (HON), 2:17.300
5. Tom Vialle (KTM), 2:17.362
6. Joseph Savatgy (TRI), 2:17.391
7. Levi Kitchen (KAW), 2:17.411
8. Jalek Swoll (TRI), 2:17.534
9. Pierce Brown (GAS), 2:17.548
10. Jordon Smith (YAM), 2:18.175
11. Nicholas Romano (YAM), 2:18.424
12. Julien Beaumer (KTM), 2:18.444
13. Daxton Bennick (YAM), 2:18.657
14. Coty Schock (YAM), 2:18.888
15. Casey Cochran (HUS), 2:18.896
16. Dilan Schwartz (SUZ), 2:19.214
17. Talon Hawkins (KTM), 2:19.383
18. Ryder DiFrancesco (GAS), 2:19.467
19. Jett Reynolds (YAM), 2:20.318
20. Lance Kobusch (HUS), 2:21.330
21. Ryder McNabb (KTM), 2:21.459
22. Evan Ferry (GAS), 2:21.485
23. Mark Fineis (YAM), 2:22.199
24. Lux Turner (KTM), 2:22.832
25. Jorgen-Matthias Talviku (KTM), 2:22.884
26. Slade Smith (KTM), 2:22.898
27. Hardy Munoz (KAW), 2:23.265
28. Dalton Venter (KAW), 2:23.642
29. Marcus Phelps (KTM), 2:24.242
30. Thomas Welch (KTM), 2:24.268
31. Brock Bennett (KTM), 2:24.342
32. Cameron Durow (KTM), 2:24.455
33. Slade Varola (KAW), 2:24.551
34. Stav Orland (KAW), 2:24.658
35. Kai Aiello (HUS), 2:24.717
36. Blake Gardner (YAM), 2:24.801
—
37. Kyle Wise (KAW), 2:25.170
38. Crockett Myers (YAM), 2:25.252
39. Bailey Kroone (KTM), 2:25.450
40. Matti Jorgensen (GAS), 2:26.091
41. Ashton Bloxom (YAM), 2:27.560
42. Jesse Jacobsen (KTM), 2:27.719
43. Leo Tucker (SUZ), 2:27.916
44. Gavin Brough (HON), 2:28.607
45. Raice Hernandez (KTM), 2:29.176
46. Konnor Visger (HON), 2:29.997
47. Ty Freehill (KTM), 2:30.314
48. Preston Wittkopp (KAW), 2:30.361
49. Ethan Day (KAW), 2:30.737
50. Deegan Hepp (HON), 2:31.290
51. Keegan Rowley (YAM), 2:31.421
52. Hunter DaSilva (KTM), 2:31.674
53. Jason Fichera (KAW), 2:31.804
54. Ragan Cochran (GAS), 2:31.855
55. Kyle DeRoche (YAM), 2:32.245
56. Elijah Tetzlaff (YAM), 2:32.806
57. Damon Strobel (YAM), 2:34.146
58. Jake Bork (HON), 2:34.410
59. Gage Hulsey (KAW), 2:34.907
60. Gavin Tilford (KTM), 2:35.129
61. Anthony Roth (HON), 2:35.657
62. Max Darling (HUS), 2:36.503
63. Hayden Hoover (YAM), 2:36.790
64. Brett Stralo (GAS), 2:38.177
65. Brian Saunier (KTM), 2:40.703
66. Lucas Padrutt (YAM), 2:43.501
67. Talon Schwall (YAM), 2:43.961
68. Tyler Aldor (YAM), 2:45.770
