Iowa Corn 350
Iowa Speedway — August 3, 2025
William Byron
Winner
350
Laps
37
Entries
6
Leaders
William Byron won the 2025 Iowa Corn 350 at Iowa Speedway on August 3, 2025, leading 141 of 350 laps. Chase Briscoe finished second; Brad Keselowski rounded out the podium. The race featured 6 different leaders.
Race Details
| Pos | Start | +/- | Driver |
|---|---|---|---|
| 1 | 2 | +1 | William Byron |
| 2 | 1 | -1 | Chase Briscoe |
| 3 | 5 | +2 | Brad Keselowski |
| 4 | 6 | +2 | Ryan Blaney |
| 5 | 33 | +28 | Ryan Preece |
| 6 | 15 | +9 | Bubba Wallace |
| 7 | 16 | +9 | Alex Bowman |
| 8 | 7 | -1 | Carson Hocevar |
| 9 | 14 | +5 | Joey Logano |
| 10 | 18 | +8 | Austin Dillon |
| 11 | 28 | +17 | Ross Chastain |
| 12 | 4 | -8 | Austin Cindric |
| 13 | 12 | -1 | Josh Berry |
| 14 | 8 | -6 | Chase Elliott |
| 15 | 29 | +14 | John Hunter Nemechek |
| 16 | 25 | +9 | Erik Jones |
| 17 | 17 | — | Christopher Bell |
| 18 | 9 | -9 | A.J. Allmendinger |
| 19 | 22 | +3 | Tyler Reddick |
| 20 | 37 | +17 | Kyle Busch |
| 21 | 20 | -1 | Ty Gibbs |
| 22 | 27 | +5 | Chris Buescher |
| 23 | 10 | -13 | Justin Haley |
| 24 | 11 | -13 | Denny Hamlin |
| 25 | 26 | +1 | Daniel Suarez |
| 26 | 19 | -7 | Cole Custer |
| 27 | 13 | -14 | Michael McDowell |
| 28 | 3 | -25 | Kyle Larson |
| 29 | 31 | +2 | Noah Gragson |
| 30 | 24 | -6 | Riley Herbst |
| 31 | 21 | -10 | Shane van Gisbergen |
| 32 | 35 | +3 | Cody Ware |
| 33 | 30 | -3 | Ricky Stenhouse Jr. |
| 34 | 34 | — | Todd Gilliland |
| 35 | 32 | -3 | Ty Dillon |
| 36 | 23 | -13 | Zane Smith |
| 37 | 36 | -1 | Joey Gase |
Stage Results
| Driver | Stage 1 | Stage 2 | Stage 3 | Stage Pts |
|---|---|---|---|---|
| Brad Keselowski | 1 | 1 | — | 20 |
| Austin Cindric | 2 | 3 | — | 17 |
| Ryan Blaney | 4 | 2 | — | 16 |
| William Byron | 3 | 3 | — | 8 |
| Chase Briscoe | 5 | 5 | — | 6 |
| Kyle Busch | — | 5 | — | 6 |
| Josh Berry | — | 6 | — | 5 |
| Alex Bowman | — | 7 | — | 4 |
| Carson Hocevar | 7 | 7 | — | 4 |
| Chase Elliott | 8 | 8 | — | 3 |
| Erik Jones | — | 8 | — | 3 |
| Ryan Preece | — | 9 | — | 2 |
| Austin Dillon | — | 10 | — | 1 |
| Bubba Wallace | — | — | — | — |
| Joey Logano | — | — | — | — |
| Ross Chastain | — | — | — | — |
| John Hunter Nemechek | — | — | — | — |
| Christopher Bell | — | — | — | — |
| A.J. Allmendinger | — | 9 | — | — |
| Tyler Reddick | — | — | — | — |
| Ty Gibbs | — | — | — | — |
| Chris Buescher | — | — | — | — |
| Justin Haley | — | — | — | — |
| Denny Hamlin | — | — | — | — |
| Daniel Suarez | — | — | — | — |
| Cole Custer | — | — | — | — |
| Michael McDowell | — | — | — | — |
| Kyle Larson | — | — | — | — |
| Noah Gragson | — | — | — | — |
| Riley Herbst | — | — | — | — |
| Shane van Gisbergen | — | — | — | — |
| Cody Ware | — | — | — | — |
| Ricky Stenhouse Jr. | — | — | — | — |
| Todd Gilliland | — | — | — | — |
| Ty Dillon | — | — | — | — |
| Zane Smith | — | — | — | — |
| Joey Gase | — | — | — | — |
Model Performance
How well did the NR-Rating model predict this race? Across 37 matched drivers, the model averaged 8.6 positions off — close to the season average of 8.5. Average
| Pos | Driver | Predicted | Actual | Delta |
|---|---|---|---|---|
| 1 | William Byron | 10.7 | 1 | +9.7 |
| 2 | Chase Briscoe | 11.9 | 2 | +9.9 |
| 3 | Brad Keselowski | 11.2 | 3 | +8.2 |
| 4 | Ryan Blaney | 9.2 | 4 | +5.2 |
| 5 | Ryan Preece | 10.1 | 5 | +5.1 |
| 6 | Bubba Wallace | 12.7 | 6 | +6.7 |
| 7 | Alex Bowman | 13.5 | 7 | +6.5 |
| 8 | Carson Hocevar | 13.1 | 8 | +5.1 |
| 9 | Joey Logano | 14.7 | 9 | +5.7 |
| 10 | Austin Dillon | 17.1 | 10 | +7.1 |
| 11 | Ross Chastain | 13.3 | 11 | +2.3 |
| 12 | Austin Cindric | 15.4 | 12 | +3.4 |
| 13 | Josh Berry | 22.9 | 13 | +9.9 |
| 14 | Chase Elliott | 7.8 | 14 | -6.2 |
| 15 | John Hunter Nemechek | 19.1 | 15 | +4.1 |
| 16 | Erik Jones | 16.7 | 16 | +0.7 |
| 17 | Christopher Bell | 10.7 | 17 | -6.3 |
| 18 | A.J. Allmendinger | 18.3 | 18 | +0.3 |
| 19 | Tyler Reddick | 6.2 | 19 | -12.8 |
| 20 | Kyle Busch | 17.0 | 20 | -3.0 |
(showing top 20 finishers)
Predicted finish from NR-Rating model. Delta = predicted − actual (positive = driver beat prediction). Confidence: High Confidence = low variance (stdDev ≤ 9), Moderate = medium variance, Coinflip = high variance.
Historical Context
- William Byron: has 5 career starts at Iowa Speedway with a 2.8 avg finish (3 wins) — the model may have underweighted this track history.
- Tyler Reddick: was the model’s top pick based on 10 career starts at Iowa Speedway with a 12.5 avg finish, finishing P19 on the day.
- Cody Ware: was the biggest surprise, finishing P32 vs predicted P56. Track history: 2 starts, 26.5 avg finish.
Explore More
Frequently Asked Questions
Who won the 2025 Iowa Corn 350?
William Byron won the 2025 Iowa Corn 350 at Iowa Speedway driving for Hendrick Motorsports.
Where was the 2025 Iowa Corn 350 held?
The 2025 Iowa Corn 350 was held at Iowa Speedway on August 3, 2025.