Ultra Running Hub Golden, CO, United States · Saturday, December 5, 2026
Sawmill 55k Race
What the course asks
DUV results for the 2025 edition (55km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, December
Regional 2001-2020 average for December — NASA POWER, grid elevation 1801 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 55km | 52 | Rusty Taylor · 05:42:00 | Amanda Greenman · 05:58:00 |
| 2024 | 55km | 36 | Brett Carlson · 05:31:00 | Cheryl Matson · 06:29:00 |
| 2023 | 55km | 28 | Ryan Slocum · 06:00:00 | Aleksandra Wronka · 06:28:01 |
| 2022 | 55km | 28 | Leslie Cowan · 06:30:00 | Nicole Anderson · 06:33:00 |
| 2021 | 55km | 37 | Bradley Fiala · 05:44:00 | Michelle Geib · 07:03:00 |
| 2020 | 55km | 17 | Ryan McAvoy · 03:41:00 | Sara Stallings · 04:32:00 |
| 2019 | 55km | 41 | Alex Nichols · 05:23:00 | Michelle Kent · 07:31:00 |
| 2018 | 55km | 56 | Jack Wilkinson · 05:41:00 | Addie Bracy · 06:01:00 |
| 2017 | 55km | 29 | Alex Nichols · 04:56:00 | Christine Tokarz · 06:59:00 |
The field grew 44% between 2024 (36) and 2025 (52). 25% of the 2025 field were women.
DUV results for the 2025 edition (55km) — 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 55 km of trail with 2,580 m of ascent.
- Trail Running Shoes 47 m of climb per kilometre — grip and rock protection before cushioning.
- Race Nutrition 55 km of self-supported fuelling between aid stations.
- Hydration Vests Pole attachment and chest-strap stability on steep ground.
- Trekking Poles 2,580 m of ascent to walk up.
- GPS Watches Battery life first — a 55 km day outlasts most full-GPS modes.
Overview
The Sawmill 55k Race, a trail race put on by Human Potential Series in Golden, CO, has a total elevation gain of 2580 meters over its 55-kilometer course. This climb of 46.9 meters per kilometer is packed into a figure-8 loop that uses mostly single track and some double track fire road.
With a 10-hour time limit, runners must maintain a pace tighter than 60% of 50k races, requiring them to hold 10.9 minutes per kilometer to avoid the cutoff. This makes it a more challenging race against the clock than 60% of its 1019 peer 50k races.
The race, which costs US$95 to enter, has been held 9 times since 2017, most recently in 2025. With a field size larger than 60% of 2660 comparable 50k races, it offers a more populated experience than most.
Similar races
Other 50K trail ultras, closest in distance first.