Ultra Running Hub Bellevue, AB, Canada · Saturday, October 31, 2026
The Dark 12 Hours Underground
We hold no course length for this race — a timed or backyard event is measured by the clock, not the kilometre — so there is no Grit score to give you.
What the course asks
DUV results for the 2025 edition (12h) — ranked runners only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, October
Regional 2001-2020 average for October — NASA POWER, grid elevation 720 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 12h | 12 | Jake Silverthorn · 80.000 km | Gabriela Brooker · 78.500 km |
| 2024 | 12h | 11 | Clinton Sikkes · 83.000 km | Miroslava Vikhrenko · 101.500 km |
| 2023 | 12h | 18 | Andrew Thomas · 109.998 km | Tess Owen · 103.995 km |
The field grew 9% between 2024 (11) and 2025 (12). 42% of the 2025 field were women.
DUV results for the 2025 edition (12h) — ranked runners 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 this trail race.
- Trail Running Shoes Cushioning on trail that is still there in the last quarter.
- Race Nutrition Self-supported fuelling between aid stations.
- Hydration Vests Flask capacity without the bounce.
- Headlamps A 12 h limit puts you out there after dark.
- GPS Watches Battery life first — an ultra outlasts most full-GPS modes.
Similar races
Other trail ultras of the same format.