Blood Rock 100
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Blood Rock 100 and Blood Rock Series, Oak Mountain State Park
Blood Rock takes place December 4–6, 2026 at Oak Mountain State Park, meeting and finishing at the Cabins on Tranquility Lake in Pelham, Alabama. The event is organized by Southeastern Trail Runs and includes multiple distance options over the park's trail network.
- Blood Rock 100 - 101.79 miles
- Blood Rock 50 Mile - 51.19 miles
- Blood Rock 50K - 31.18 miles
- Blood Rock 25K - 16.62 miles
The Blood Rock 100 is two full laps of the new Blood Rock course; the 50 mile is one full lap. The 50K follows the North Loop including sections of the Belcher Tract, while the 25K passes Summit Lake and Demopolis Lake and splits from the longer courses just past King's Chair. Course composition and elevation for main distances: the 100 has 17,196 ft gain and loss with about 92.84 miles single track, 7.74 miles gravel and 1.18 miles paved; the 50 has 8,659 ft gain and loss with about 46.42 miles single track, 3.87 miles gravel and 0.59 miles paved. The 50K lists 5,345 ft gain and loss, the 25K lists 2,885 ft gain and loss.
Aid is provided roughly every 5–7 miles and includes hot soup, hot food through the night, cold drinks (bring your own cup) and breakfast in the early hours. Summit Lake is a spring fed quarry lake on the mountain crest and hosts an aid station with lake views.
Shirt cutoffs are listed as October 20 and November 16. Registration closes in late November and there is no late or on site registration. Refunds are available through UltraSignup up to 30 days before registration closes; after that entries may be rolled over or converted to race credit. In the event of cancellation due to conditions beyond organizer control, full refunds apply up to 30 days before the event, after which entries roll to the next year. Visit the organization's website for the most recent information.
