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Alabama · Pelham
Blood Rock
Dec 4, 2026
Blood Rock covers 101.79 miles through Oak Mountain State Park — Alabama's largest — on two loops of a 50-mile circuit: 92.84 miles of single-track, 7.74 miles of gravel, and 1.18 miles of pavement threading ridge-tops and valley floors past Summit, Demopolis, and Belcher lakes. Elevation gain is 17,512 feet; the 44-hour cutoff is the longest of any major Alabama 100. Mandatory gear includes a GPS device, emergency bivy sack, and water filter, reflecting the seriousness of December cold and remote terrain south of Birmingham. Results on UltraSignup date to 2013.
The numbers
Race statistics
- Distance
- 100 mi
- Vertical gain
- 17,000 ft
- Course
- Loop
- Unique miles
- 48 mi
- Entry fee
- $380
- Lottery
- No
- Avg finishers
- 18
170 ft / mi
2 mi loop
per year
The course
Course line from published GPX · source · approximate — always follow official markings
◈ From the runners