Course Records
Official all-time course records set at the Lean Horse Ultra, Custer, South Dakota.
Records last updated: July 2026
100 Mile
100MMen
| Time | Athlete | Year |
|---|---|---|
| 16:19:41 | Keith Miller | 2022 |
Women
| Time | Athlete | Year |
|---|---|---|
| 18:06:47 | Relena Ribbons | 2022 |
100 Mile Relay
RelayOpen Division — Up to 5 Runners
| Time | Team Name | Year |
|---|---|---|
| 13:40:47 | Run Like a Girl | 2026 |
50 Mile
50MMen
| Time | Athlete | Year |
|---|---|---|
| 6:52:54 | Austin Baade | 2025 |
Women
| Time | Athlete | Year |
|---|---|---|
| 7:34:27 | Amy Feit | 2025 |
30 Mile
30MMen
| Time | Athlete | Year |
|---|---|---|
| 3:47:10 | Tim Fryer | 2025 |
Women
| Time | Athlete | Year |
|---|---|---|
| 4:36:16 | Tess Kieselhorst | 2025 |
20 Mile
20MMen
| Time | Athlete | Year |
|---|---|---|
| 2:09:06 | Jack Errea | 2026 |
Women
| Time | Athlete | Year |
|---|---|---|
| 3:06:47 | Sarah Avila | 2024 |
Black Hills CrossFit Edition
BHCFESingles
| Time | Athlete | Year |
|---|---|---|
| 4:53:46 | Austin Freeburg | 2023 |
Team of 3
| Time | Team Name | Year |
|---|---|---|
| 4:39:42 | Cakes on the Griddle | 2026 |
Team of 6
| Time | Team Name | Year |
|---|---|---|
| 5:15:55 | Spearfish 6-Pack | 2026 |
* The Black Hills CrossFit Edition follows the 30-mile Mickelson Trail course. The Singles record represents the fastest single-athlete endurance performance. Times reflect total elapsed time from gun start to finish-line crossing.