Ultra Running Hub Big Sky, MT, United States · Sunday, September 13, 2026
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.
The Aid Station
Course-specific beta from the community
This is a mountain course. Poles are highly recommended for the sustained climbs.
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
The Rut Mountain Runs 50k, organized by Runner’s Edge, takes place in Big Sky, MT in September 2026. This trail race, with its 3040 meters of elevation gain over 50 kilometers, presents a significant climbing challenge. Runners will encounter 60.8 meters of ascent for every kilometer, making it a demanding course.
With 522 finishers in its latest edition, this race draws a larger field than 98% of its 2663 peer 50k events. The 13-hour time limit translates to a cutoff pace of 15.6 minutes per kilometer, which is more generous than 17% of 1022 peer 50k races. The course includes jeep roads, forested single track, alpine ridge lines, and the summit of Lone Peak.
Similar races
Other 50K trail ultras, closest in distance first.