In 168 days · Fri, Nov 27, 2026
When
Friday, November 27th, 2026
Where
4000 Shaw Dr., Marble Falls TX
Distances
Ultra · Marathon · Half · 10K
About this race
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 PLANWhat'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!
Course map
Gear up for your ultra
What runners rely on for long days on their feet.
Top pick
SWIFTVEST Running Vest for Women & Men with Water Bottle | Lightweight Hydration Vest | Reflective Running Gear | Adjustable Fit | 6 Pockets | Phone Holder for Runners
$37.99
Garmin Forerunner 55, GPS Running Watch with Daily Suggested Workouts, Up to 2 Weeks of Battery Life, Black - 010-02562-00
$159.99
SHOKZ OpenRun Bone Conduction Open-Ear Bluetooth Sport Headphones, Running Workout Bundle with Waterproof Carrying Case & Sweat Headband, IP67 Sweat Resistant, 8H Playtime, Mic, Black
$129.95
Venture Pal Chewable Electrolyte Tablets, 80 Count Fast-Dissolve Sugar-Free Stick Salt Tablets,Gluten Free – Variety Pack for Rapid Hydration, Outdoor Running, Hiking | Keto & Vegan Friendly | 4 Pack
$16.79
LHKNL Headlamp Flashlight, Lumen Ultra-Light Bright LED Rechargeable Headlight with White Red Light, 2-Pack Waterproof Motion Sensor Head Lamp,8 Modes for Outdoor Camping Running Hiking Fishing
$19.99
Train with a club
Run clubs near Marble Falls to train with before race day.
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