Colorado River Run 100 Mile • 50 Mile • 50K • Marathon • Half Marathon • 10K • 5K
Fri, Nov 27, 2026, 4:00 AM CST
- Type
- Run
Finish signup on the organizer site (check fees and dates there).
Race feel
Challenge your endurance on scenic river trails, from a family-friendly 5K to an epic 100-mile ultra, all while supporting youth running.
- Fun
- Scenic
- Competitive
- For a Cause
Fun
Scenic
Competitive
For a CauseGreat for
- Beginner Friendly
- Family Friendly
Beginner Friendly
Family FriendlyEmbark on an invigorating trail adventure at the Colorado River Run in Marble Falls, TX. This event invites you to connect with nature along the scenic banks of the majestic Colorado River at Turkey Bend Park. Choose from a wide range of distances, including 100-mile and 50-mile ultras, a marathon, half-marathon, 10K, and a family-friendly 5K. The course offers diverse landscapes and challenging terrain, designed for both competitive athletes and recreational runners seeking a memorable outdoor experience.
What to expect
- Navigate a mix of single-track trails, dirt paths, and technical sections with moderate elevation changes.
- Enjoy stunning river views, natural habitats, and diverse ecosystems throughout your run.
- Benefit from fully stocked aid stations providing hydration, nutrition, and medical assistance.
Standout details
- 100-mile and 50-mile ultra distances
- Family-friendly 5K option (kids run free)
- Pacers allowed for ultra distances
- Camping spots available at Turkey Bend Park
Perks & features
- Medal
- Shirt
Medal
ShirtFrom the public listing; confirm on the official site.
Distances & registration
9 optionsUse the official signup link above for all distances.
50 Mile
1 option · closes Nov 27, 2026, 2:00 AM CST
6mo 28d 18h 44m leftRun
Closes Nov 27, 2026, 2:00 AM CST · From $128.19
100 Mile
1 option · closes Nov 27, 2026, 2:00 AM CST
6mo 28d 18h 44m leftRun
Closes Nov 27, 2026, 2:00 AM CST · From $149.39
Other options
1 option · closes Nov 28, 2026, 2:00 AM CST
6mo 29d 18h 44m leftPacer Registration (50- and 100-Mile Run)
Closes Nov 28, 2026, 2:00 AM CST · From $16.90
5K
2 options · closes Nov 28, 2026, 2:00 AM CST
6mo 29d 18h 44m leftKids
Closes Nov 24, 2026, 6:59 PM CST · From $0.00
Double Turkey 5K Run/Walk
Closes Nov 28, 2026, 2:00 AM CST · From $32.80
10K
1 option · closes Nov 28, 2026, 2:00 AM CST
6mo 29d 18h 44m leftDouble Turkey 10K
Closes Nov 28, 2026, 2:00 AM CST · From $53.99
Half Marathon
1 option · closes Nov 28, 2026, 2:00 AM CST
6mo 29d 18h 44m left1/2 Marathon
Closes Nov 28, 2026, 2:00 AM CST · From $75.19
Marathon
1 option · closes Nov 28, 2026, 2:00 AM CST
6mo 29d 18h 44m leftGeneral entry
Closes Nov 28, 2026, 2:00 AM CST · From $85.79
50K
1 option · closes Nov 27, 2026, 6:59 PM CST
6mo 29d 11h 43m leftGeneral entry
Closes Nov 27, 2026, 6:59 PM CST · From $95.34
Summaries use public event text. Confirm schedule, fees, and rules on the official page before you sign up.
From the organizer
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 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!
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 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!
REGISTER NOW!