Ultra Running Hub Big Sky, MT, United States · Sunday, September 12, 2027
The Rut Mountain Runs
What the course asks
DUV results for the 2025 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, September
Regional 2001-2020 average for September — NASA POWER, grid elevation 1997 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 50km | 522 | Adam Loomis · 05:13:57 | Erika Flowers · 06:30:19 |
| 2024 | 50km | 543 | Michelino Sunseri · 05:01:13 | Klaire Rhodes · 05:45:29 |
| 2023 | 50km | 496 | Michelino Sunseri · 04:59:32 | Jennifer Lichter · 05:34:59 |
| 2022 | 50km | 485 | David Sinclair · 05:04:18 | Jennifer Lichter · 06:14:59 |
| 2021 | 50km | 412 | Michelino Sunseri · 05:25:47 | Jennifer Lichter · 06:14:34 |
| 2019 | 50km | 414 | Cody Lind · 05:29:45 | Erika Flowers · 06:51:53 |
| 2018 | 50km | 421 | Jackson Brill · 05:17:55 | Sandi Nypaver · 06:13:36 |
| 2017 | 50km | 379 | Luis Alberto Hernando Alzaga · 05:10:16 | Ragna Cathelijne Debats · 06:13:56 |
| 2016 | 50km | 402 | Cristofer Clemente Mora · 03:51:53 | Ida Nilsson · 04:27:30 |
| 2015 | 50km | 315 | Franco Leo Colle · 05:16:59 | Emelie Forsberg · 06:25:45 |
The field has held steady: 543 in 2024, 522 in 2025. 31% of the 2025 field were women.
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Course notes
- terrain This is a mountain course. Poles are highly recommended for the sustained climbs.
- gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail with 3,040 m of ascent.
- Trail Running Shoes 61 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition 50 km of self-supported fuelling between aid stations.
- Hydration Vests Pole attachment and chest-strap stability on steep ground.
- Trekking Poles 3,040 m of ascent to walk up.
- Headlamps A 13 h limit puts you out there after dark.
Overview
Held in Big Sky, MT, The Rut Mountain Runs 50k packed 3040 meters of elevation gain into its 50-kilometer course, working out to a steep 60.8 meters of climb per kilometer over terrain ranging from forested singletrack and jeep roads to exposed alpine ridge lines and the summit of Lone Peak.
Despite the severe profile, the 13-hour time limit provided a cut-off pace of 15.6 minutes per kilometer, making it more generous than 82% of 50k peers and tighter than 18%. That forgiving pacing buffer accommodates the slow mountain travel demanded by the vertical profile, allowing 522 finishers across the line in 2025.
Organised by Runner’s Edge, the event grew a massive presence over 10 editions from 2015 to 2025, drawing a field bigger than 98% of 50k races and smaller than only 2%.
Similar races
Other 50K trail ultras, closest in distance first.