Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K

COLORADO RIVER RUN Run to the River "Out here on these trails, not all who wander are lost, some are simply finding their strength."

100 MILES 50 MILES, 10 MILES & 5 MILES 50K & MARATHON HALF MARATHON 10K & 5K

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

Start Time: 8:00 AM Cut-off: 39 hours

The ultimate river trail adventure for endurance athletes

50 Mile Ultramarathon, 10 Miler, 5 Miler

Start Time: 8:00 AM Cut-off: 36 hours

Challenge yourself with breathtaking river views

50K & Marathon (26.2 miles)

Start Time: 8:30 AM Cut-off: 12 hours

Classic distance with unforgettable scenery

Half Marathon (13.1 miles)

Start Time: 8:30 AM Cut-off: 9 hours

Perfect distance to enjoy the river trails

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

Start Time: 8:30 AM Cut-off: 9 hours

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 sectionsScenery: Stunning river views, natural habitats, and diverse ecosystemsElevation: Moderate with some challenging climbs and descentsSupport: Well-stocked aid stations with friendly volunteersCommunity: Welcoming atmosphere for runners of all abilities

Ready for 100 Miles? Access your complete 100-mile training plan to prepare for this epic adventure! ACCESS TRAINING PLAN

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. Children MUST be registered to participate

Volunteer Opportunities  

  We Need Help With:   Course MarshalsAid Station SupportRegistration/Packet Pickup Assistants

  All Volunteers Receive:   Race shirtMeal and snacksCommunity service hoursFuture race credit

  Shifts Available:   Morning: 7:00 AM - 1:00 PMAfternoon: 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! REGISTER NOW!