Ultra Running Hub Decorah, IA, United States · Saturday, June 5, 2027
Crater 50km Trail Run - Driftless Discovery
Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.
What the course asks
DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, June
Regional 2001-2020 average for June — NASA POWER, grid elevation 343 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2026 | 50km | 55 | John Donovan · 03:59:39 | Emily Perreault · 06:49:40 |
| 2025 | 50km | 50 | Cooper Mumford · 04:34:45 | Margaret Ho · 05:16:03 |
| 2024 | 50km | 55 | Kory Kowallis · 04:38:28 | Lila Planavsky · 06:24:34 |
| 2023 | 50km | 39 | Liam Conroy · 04:33:39 | Amy Oberbroeckling · 05:42:28 |
| 2022 | 50km | 28 | Cody Jones · 04:30:01 | Kari Justin · 08:02:06 |
| 2021 | 50km | 57 | Adrian Swanson · 04:19:02 | Isabella Blackman · 04:50:06 |
| 2020 | 50km | 18 | Scott Gall · 04:12:53 | Kari Justin · 06:12:39 |
| 2019 | 50km | 39 | Wynn Davis · 04:22:50 | Angie Darbyson · 05:17:49 |
| 2018 | 50km | 28 | Andrew Westendorf · 04:41:19 | Erica Lensink · 05:22:12 |
The field grew 10% between 2025 (50) and 2026 (55). 27% of the 2026 field were women.
DUV results for the 2026 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
The Aid Station
Course-specific beta from the community
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail.
- Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition 50 km of self-supported fuelling between aid stations.
- Hydration Vests Flask capacity for 50 km, without the bounce.
- GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.
Overview
The Crater 50km Trail Run - Driftless Discovery is a 50-kilometer fixed-distance trail race organised by Driftless Discovery Trail Run, taking place in Decorah, IA, United States. The race has been held 9 times, with the first edition in 2018 and the latest in 2026.
With 55 finishers in 2026, this race draws a larger field than 61% of its 2667 peer 50k races. The course uses a 17-mile system of single-track mountain bike trails, which are described by the organiser as groomed and marked. The next edition will take place on June 5, 2027.
Similar races
Other 50K trail ultras, closest in distance first.