Blood Rock 100
Pelham, United States • 5 Dec 2025
Event overview
Blood Rock takes place December 5-7, 2025 at Oak Mountain State Park, Meeting Center at the Cabins on Tranquility Lake in Pelham, AL. The weekend features four events:
- 101.79 miles
- 51.19 miles
- 31.18 miles
- 16.62 miles
Registration closes December 1 at midnight CT. There is no on-site registration at the start. Shirt order deadlines are October 20 and November 16; the final shirt order is placed November 17. Students (high school age or under) may register with a 50% discount using a discount code at checkout. Refunds are available through UltraSignup up to 30 days before registration closes; after that entrants may roll entries to the next year or receive race credit. If the race is cancelled for reasons beyond the organizer's control, full refunds are offered up to 30 days prior; after that entries roll over.
Courses and support
The Blood Rock 100 is two full laps of the new Blood Rock course; the Blood Rock 50 is one full lap. The 50K follows one full lap of the North Loop including the Belcher Tract. The 25K passes Summit Lake and Demopolis Lake, then splits back toward the finish near King's Chair.
Course details for the 100: elevation gain 17,196 ft, single-track 92.84 miles, gravel 7.74 miles (cars not allowed), paved 1.18 miles. The 50-mile course lists 8,659 ft gain and 46.42 miles of single track. Aid stations are placed approximately every 5-7 miles and provide hot soup, hot food overnight, cold drinks (bring your own cup), and breakfast in the early hours. Packet pickup, drop-bag options, and race briefings are scheduled on the days before each race; the course closes Sunday morning. Visit the organization's website for the most recent information.