Ultra Running Hub Denison, TX, United States · Saturday, October 10, 2026
Fixed Distance 50K
Caveman Challenge at Waterloo Lake
4 days to go
50 km Distance
not publishedn/a Climbing
2.5 est Grit · Entry level
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
Field size ~7 Tiny. You will run alone for most of it.
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, October
Daytime high 24°C
Night low 12°C
Rainfall Showers likely
Daylight 11 h 34 m of light
Regional 2001-2020 average for October — NASA POWER, grid elevation 196 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 50km | 7 | Jorge Ramirez · 05:44:20 | Laurie Martin · 05:36:11 |
| 2024 | 50km | 11 | Connor Chapman · 06:08:58 | — |
The field shrank 36% between 2024 (11) and 2025 (7). 14% 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
- gear 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.
Similar races
Other 50K trail ultras, closest in distance first.