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2025 Iowa Corn 350 practice 1 results

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NASCAR Cup Series race number 23 of 36
Sunday, August 3, 2025 at Iowa Speedway, Newton, IA
350 laps on a 0.875 mile paved track (306.250 miles)

Time of race: 3:17:47
Average speed: 92.905 mph
Pole speed: 136.933 mph		Cautions: 12 for 72 laps
Margin of victory: 1.192 sec
Attendance: n/a
Lead changes: 10
Green flag passes: 2,861 (10.3 per green flag lap)
(Source: NASCAR loop data)

Glossary    2025 NASCAR Cup Series results   /   2025 standings

Practice 1 results for this race:
RankDriverNbrCarTimeDiffSpeed# LapsBest Lap
1Christopher Bell20Toyota23.511     133.980   399
2Bubba Wallace23Toyota23.526   0.015   133.894   409
3Chase Briscoe19Toyota23.546   0.035   133.781   4119
4William Byron24Chevrolet23.551   0.040   133.752   4312
5Kyle Larson5Chevrolet23.564   0.053   133.678   398
6Tyler Reddick45Toyota23.571   0.060   133.639   4119
7Alex Bowman48Chevrolet23.575   0.064   133.616   3118
8Brad Keselowski6Ford23.578   0.067   133.599   2215
9Chase Elliott9Chevrolet23.591   0.080   133.525   519
10Denny Hamlin11Toyota23.596   0.085   133.497   469
11Chris Buescher17Ford23.615   0.104   133.390   3625
12Austin Cindric2Ford23.623   0.112   133.345   394
13Justin Haley7Chevrolet23.632   0.121   133.294   4527
14Ty Gibbs54Toyota23.633   0.122   133.288   389
15Ryan Blaney12Ford23.639   0.128   133.254   428
16Carson Hocevar77Chevrolet23.648   0.137   133.204   285
17Kyle Busch8Chevrolet23.658   0.147   133.147   1713
18Ross Chastain1Chevrolet23.662   0.151   133.125   3825
19Ty Dillon10Chevrolet23.671   0.160   133.074   3317
20Austin Dillon3Chevrolet23.671   0.160   133.074   3120
21Shane Van Gisbergen88Chevrolet23.691   0.180   132.962   4324
22A.J. Allmendinger16Chevrolet23.694   0.183   132.945   3613
23John H. Nemechek42Toyota23.709   0.198   132.861   466
24Erik Jones43Toyota23.732   0.221   132.732   3933
25Cody Ware51Ford23.772   0.261   132.509   244
26Riley Herbst35Toyota23.786   0.275   132.431   3818
27Daniel Suarez99Chevrolet23.786   0.275   132.431   237
28Michael McDowell71Chevrolet23.786   0.275   132.431   3526
29Ryan Preece60Ford23.792   0.281   132.397   283
30Zane Smith38Ford23.829   0.318   132.192   3125
31Todd Gilliland34Ford23.846   0.335   132.098   249
32Ricky Stenhouse Jr47Chevrolet23.853   0.342   132.059   379
33Josh Berry21Ford23.868   0.357   131.976   2418
34Noah Gragson4Ford23.874   0.363   131.943   218
35Cole Custer41Ford24.008   0.497   131.206   2421
36Joey Logano22Ford24.033   0.522   131.070   322
37Joey Gase66Ford25.103   1.592   125.483   2020