Events

$120 $100 11/28 - 11/29 6:30AM CST - 6:30PM CST Price increases after July 30, 2025 at 11:59pm CDT

$100 $80 11/28 - 11/29 6:30AM CST - 6:30PM CST Price increases after July 30, 2025 at 11:59pm CDT

$80 $70 11/29 8:30AM CST - 5:00PM CST Price increases after July 30, 2025 at 11:59pm CDT

$70 $60 11/29 8:30AM CST - 5:00PM CST Price increases after July 29, 2025 at 11:59pm CDT

$35 $30 11/29 8:30AM CST - 5:00PM CST Price increases after July 29, 2025 at 11:59pm CDT

$0 11/29 8:30AM CST - 5:00PM CST Registration ends November 28, 2025 at 11:59pm CST

Open to ages 8 - 17.

$35 $30 11/29 8:30AM CST - 5:00PM CST Price increases after July 29, 2025 at 11:59pm CDT

11/29 8:30AM CST - 5:00PM CST

Race Website

Additional race information can be found at https://fitfoundation.org/colorado-river-run-1.

Place

16900 Cherry Ln
Lago Vista, TX US 78645

Description

COLORADO RIVER RUN

Run to the River

100 MILES

50 MILES

MARATHON

HALF MARATHON

An invigorating trail adventure at Arkansas Bend Park

Connect with Nature, Challenge Your Endurance

Set along the scenic banks and trails surrounding the majestic Colorado River at Arkansas 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.

Race Distances

100 Mile Ultramarathon

Start Time: 4:00 AM

Cut-off: 32 hours

The ultimate river trail adventure for endurance athletes

50 Mile Ultramarathon

Start Time: 6:00 AM

Cut-off: 14 hours

Challenge yourself with breathtaking river views

Marathon (26.2 miles)

Start Time: 7:00 AM

Cut-off: 8 hours

Classic distance with unforgettable scenery

Half Marathon (13.1 miles)

Start Time: 8:00 AM

Cut-off: 5 hours

Perfect distance to enjoy the river trails

5K Run/Walk (3.1 miles)

Start Time: 8:30 AM

Cut-off: 2 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

Eco-Friendly Event

Sustainable practices throughout

Family-Friendly 5K Option

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

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!

Race Contact Info

If you have any questions about this race, click the button below.

Photos

Race Pace Calculator

Need help planning your race strategy? Visit https://fitfoundation.org/colorado-river-run-1 for our interactive pace calculator and find the perfect pace for your post-Thanksgiving adventure!

Course Map

For our ultramarathon participants, the 100-mile distance consists of 10 laps around a scenic 10-mile loop, with runners alternating direction each lap (clockwise, then counterclockwise) to provide varied perspectives and engage different muscle groups throughout the journey. The 50-mile course follows the same loop for 5 laps. The tentative course map is below. The start point is indicated by the green dot. Runners will head towards the south peninsula and then return to the start and continue their journey northwards.

50- and 100-Mile Distance Ultra Buckle

Directions

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