Ultra Running Hub Munising, MI, United States · Saturday, June 6, 2026
Rock River Canyon 50K
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 221 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2026 | 50km | 29 | Desmond Cariveau · 04:56:19 | Alaina Wurfel · 05:51:12 |
| 2025 | 50km | 26 | Kaleb Klopfenstein · 04:52:46 | Catherine Zettner · 05:15:57 |
| 2024 | 50km | 30 | James Lilly · 04:50:09 | Kate Kuntze · 05:26:17 |
| 2023 | 50km | 23 | Cory Fries · 04:31:25 | Iris Lenauer · 05:23:07 |
| 2022 | 50km | 25 | Alex Dennis · 04:15:37 | Mariana Grohowski · 05:28:06 |
| 2021 | 50km | 37 | Alex Dennis · 04:12:09 | Rachel Gibson · 04:59:18 |
| 2019 | 50km | 16 | Mike Peter · 05:26:54 | Rachel Gibson · 05:18:06 |
The field grew 12% between 2025 (26) and 2026 (29). 55% 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 Rock River Canyon 50K is an out-and-back trail race in Munising, MI, with 7 editions since 2019. It offers a tighter cutoff than 80% of 50k races, requiring a pace under 9.6 minutes per kilometer to finish within the 8-hour limit.
The course features 26 miles of single track and 5 miles of dirt forest road, with 4390 feet of ascent and descent over its 31-mile length. With 29 finishers in its latest edition, this 50k has a smaller field than 42% of its peers.
Similar races
Other 50K trail ultras, closest in distance first.