Colorado River Run 100 Mile • 50 Mile • 50K • Marathon • Half Marathon • 10K • 5K

Run to the River

"Out here on these trails, not all who wander are lost, some are simply finding their strength."

An invigorating trail adventure at Turkey Bend Park

Connect with Nature, Challenge Your Endurance

Set along the scenic banks and trails surrounding the majestic Colorado River at Turkey Bend Park, this event offers a unique opportunity to connect with nature while testing your limits. Run through diverse landscapes, including riverbanks, rugged trails, and serene natural habitats as you embrace the spirit of outdoor adventure.

The Colorado River Run promises to be a memorable experience for runners and nature enthusiasts alike. The course layout is designed to highlight the river's most picturesque spots while providing a challenging terrain for runners of all levels, from competitive athletes seeking to set personal records to recreational runners looking for a unique trail experience.

Register by November 7, 2026 to guarantee your race shirt!

Reserve an 8-person camping spot here

Race Distances

100 Mile Ultramarathon

The ultimate river trail adventure for endurance athletes

50 Mile Ultramarathon, 10 Miler, 5 Miler

Challenge yourself with breathtaking river views

50K & Marathon (26.2 miles)

Classic distance with unforgettable scenery

Half Marathon (13.1 miles)

Perfect distance to enjoy the river trails

10K (6.2 miles) | 5K Run/Walk (3.1 miles)

Family-friendly option - children can accompany registered parents for free!

Course Description

Scenic River Trails

The course is designed to highlight the Colorado River's most picturesque spots while providing a challenging terrain for runners. You'll experience diverse landscapes, including riverbanks, rugged trails, and serene natural habitats.

Fully Supported Adventure

Fully stocked aid stations along the course, providing hydration, nutrition, and medical assistance to ensure your safety and well-being. Our eco-friendly practices, such as waste reduction and the use of sustainable materials, minimize the event's environmental footprint.

What You'll Experience

• Terrain: Mix of single-track trails, dirt paths, and occasional technical sections
• Scenery: Stunning river views, natural habitats, and diverse ecosystems
• Elevation: Moderate with some challenging climbs and descents
• Support: Well-stocked aid stations with friendly volunteers
• Community: Welcoming atmosphere for runners of all abilities

Ready for 100 Miles?

Access your complete 100-mile training plan to prepare for this epic adventure!

What's Included

Custom Finisher Medal

Unique medal for all finishers

Aid Stations

Fully stocked with nutrition and hydration

Support

On-course and at finish line

Pacing Allowed for Ultra Distances

Pacers are allowed for the 100 Mile Run (after mile 50) and 50 Mile Run (after mile 30) to provide safety and encouragement during later stages. One pacer per runner is permitted on course at any time. Pacers must register at the designated check-in area, sign a waiver, pay a $15 fee, and wear an official "PACER" bib. Pacers must be 18+ (16-17 with parental consent), can only enter/exit at aid stations, and cannot provide physical assistance or carry the runner's supplies. Pacers may switch at any aid station but must check in with station personnel. Pacers are only eligible for water and emergency medical support at aid stations. 

Family-Friendly 5K Option

Parents are welcome to run or walk the 5K course with their young children at no additional cost!

Organized in partnership with Healthy Kids Running Series Cedar Park. Proceeds support HKRS Cedar Park youth running programs.

Volunteer Opportunities

We Need Help With:

• Course Marshals
• Aid Station Support
• Registration/Packet Pickup Assistants

All Volunteers Receive:

• Race shirt
• Meal and snacks
• Community service hours
• Future race credit

Shifts Available:

• Morning: 7:00 AM - 1:00 PM
• Afternoon: 1:00 PM - 6:00 PM

Email: info@atxactive.com to volunteer or click here

Ready for Your Colorado River Adventure?

Join us for this unique trail experience along the scenic banks of the Colorado River. Challenge your endurance and connect with nature!

Join fellow runners on November 27, 2026 for the Colorado River Run 100 Mile • 50 Mile • 50K • Marathon • Half Marathon • 10K • 5K. It's a fantastic Ultra, 49.9K, Marathon, Half-Marathon, 10K, 5K featuring a flat and fast course in Marble Falls.