Blood Rock 100

Blood Rock 100

Blood Rock 100 is a multi-distance trail race weekend organized by Southeastern Trail Runs at Oak Mountain State Park in Pelham, Alabama. The events span early December 2026 and use the Meeting Center at the Cabins on Tranquility Lake as the start and finish area. The Blood Rock 100 is two full laps of the new course; the Blood Rock 50 is one full lap. The 50K uses the North Loop and sections of the Belcher Tract. The 25K passes Summit Lake and Demopolis Lake.

The courses combine extensive single-track trail and short sections of gravel and paved roadway closed to cars. Aid stations are placed approximately every 5 to 7 miles and provide hot soup, cold drinks, hot food overnight, and a breakfast service. Notable course features include ridge-top views, valley floors, backcountry sections, secluded pools and waterfalls, and the Crack-in-the-Wall climb that leads to Summit Lake.

Key event facts are:

• Blood Rock 100 : 101.79 miles; 17,196 ft elevation gain and loss
• Blood Rock 50 : 51.19 miles; 8,659 ft elevation gain and loss
• Blood Rock 50K : 31.18 miles; 5,345 ft elevation gain and loss
• Blood Rock 25K : 16.62 miles; 2,885 ft elevation gain and loss

Shirt order cutoffs are October 20 and November 16, with a final shirt order placed November 17. Online registration closes December 1. Refunds are available through Ultrasignup up to 30 days before registration closes; after that entries can be rolled over or credited to future Southeastern Trail Runs events. If the race is canceled for reasons beyond the organizer's control, a full refund is provided up to 30 days prior; after that entries roll over to the next year. Visit the organization's website for the most recent information.