Colorado River Trail Run

Event overview

The Colorado River Run is a multi-distance trail running event at Turkey Bend Park, Marble Falls, Texas, on November 28-29, 2025. Distances offered include:

• 100-mile ultramarathon (10 laps of a 10-mile loop)
• 50-mile ultramarathon (5 laps of the same loop)
• 50K
• Marathon (26.2 miles)
• Half marathon (13.1 miles)
• 10K
• 5K and a 5K Kids event (ages 8-17)

The 100-mile race has a 36-hour cutoff; the 50-mile shares the same 36-hour cutoff. The marathon has a 12-hour cutoff and the half, 10K and 5K have a 9-hour cutoff. All finishers receive a custom finisher medal. A 5K kids entry is listed as free for ages 8-17.

Course, support and logistics

Courses run along riverbanks and park trails and include single-track sections, dirt paths and occasional technical segments, with moderate elevation changes including climbs and descents. The 100-mile and 50-mile ultramarathons use a 10-mile loop with runners alternating loop direction each lap. Aid stations are fully stocked with hydration, nutrition and medical support. Pacers are permitted for ultra distances (100-mile after mile 50; 50-mile after mile 30); pacers must register, sign a waiver, pay a fee, meet age requirements and follow aid station entry rules. The event follows Leave No Trace and other eco-friendly practices. Volunteer roles are available with listed shifts and benefits such as a race shirt, meal and community service hours. Parking, spectator passes and campsite options are available through the event store. Visit the organization's website for the most recent information.