Blood Rock 100
Always double-check with the organizer's website! This page may contain affiliate links.
Blood Rock 100 and Blood Rock Series at Oak Mountain State Park
Blood Rock takes place at Oak Mountain State Park, with the meeting center at the Cabins on Tranquility Lake serving as the race base. Courses use mostly single-track trails with some gravel and short paved sections, and include backcountry sections, secluded pools, and multiple lakes such as Summit Lake, Demopolis Lake, and Belcher Lake.
Distances and key course data:
- Blood Rock 100: 101.79 miles; 17,196 ft gain and loss; two full laps.
- Blood Rock 50: 51.19 miles; 8,659 ft gain and loss; one full lap.
- Blood Rock 50K: 31.18 miles; 5,345 ft gain and loss; one North Loop lap.
- Blood Rock 25K: 16.62 miles; 2,885 ft gain and loss; route includes Summit Lake.
Course composition for the 100 includes about 92.84 miles of single track, 7.74 miles of gravel roads closed to cars, and 1.18 miles of paved road. Aid stations are provided approximately every 5-7 miles and offer hot soup, hot food through the night, cold drinks (participants should bring a cup), and breakfast in the early hours.
Logistics notes included by the organizer state a final shirt order deadline and shirt cutoff dates (October 20 and November 16, with a final order on November 17). There will be no on-site registration at the start. The organizer offers full refunds through UltraSignup up to 30 days before registration closes; after that date entrants may roll over their entry or receive credit for future races. In the event of cancellation due to factors beyond the organizer's control, entries are refunded up to 30 days prior or rolled over afterward. Visit the organization's website for the most recent information.
