In 26 days · Fri, Nov 27, 2026
Don't let race day sneak up
One email during race week. That's it.
Friday, November 27th, 2026
1884 State Highway 71 West,, Cedar Creek TX
Ultra · Marathon · Half · 10K
50–68°F · some rain risk
See last 10 years
On this date: rain 2 of the last 10 years
2025
48–64°F
dry
2024
57–80°F
dry
2023
40–55°F
dry
2022
49–68°F
dry
2021
48–53°F
rain
2020
59–71°F
rain
2019
52–68°F
dry
2018
34–59°F
dry
2017
52–76°F
dry
2016
57–74°F
dry
Best months to race in Texas →
About this race
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 McKinney Roughs Park
Connect with Nature, Challenge Your Endurance
Set along the scenic banks and trails surrounding the majestic Colorado River at McKinney Roughs 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!
Click here to purchase your crew and/or spectator/visitors pass
Race Distances
250K Ultramarathon
Beyond 100 miles — our most extreme distance for experienced ultra runners only. A single finish gets you the Rio Colorado Ultra Slam buckle.
100 Mile Ultramarathon
The ultimate river trail adventure for endurance athletes
50 Mile Ultramarathon
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!
Fit Foundation in partnership with Fitworks
Exceptional Athlete Division
Your path. Your pace. Your run.
Fit Foundation welcomes athletes with exceptional abilities at every race. Register as a Fitworks Adaptive Athlete, choose your course, and take the time you need to finish.
Events and Fees
Event Fee Exceptional Athlete (Fitworks) 5K $25 Exceptional Athlete (Fitworks) 10K $25 Exceptional Athlete (Fitworks) Half-Marathon $35 Exceptional Athlete (Fitworks) Marathon $35 Guide or companion (one per athlete) FreeEvery fee includes your bib, chip timing, aid stations, and finisher medal.
Choose Your Course
Adapted CourseAn accessible 1-3 mile loop near the start/finish area, repeated to reach your distance. Frequent aid and support every lap. Main Course
Run the same course as the full field, with the time accommodations below.
You pick your course when you register and may switch until race-morning check-in closes.
Take the Time You Need
- Early start: start as early as up to 1 hour before the main field.
- Extended cutoff: Significantly more time than the standard cutoff.
- The extended cutoff never runs past park closing or sunset.
Every Finish Counts
- Every finisher receives the same finisher medal as the full field.
- You are listed in the Exceptional Athlete results for your distance.
- Your distance counts toward the 250K Club and Run the River.
You Are Never Alone Out There
A sweeper or Fitworks buddy stays with athletes on the main course after the standard cutoff. Check in by bib number at each aid station, carry a phone with the race director's number saved, and our finish line stays open until every Exceptional Athlete is in.
Questions? Contact us below.
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.
Course Records:
100 Miles: Jeffrey Bergeron (M) 29:26:45
50 Miles: Andrea Fogliato (M) 8:35:56
50K: Marcos Gonzalez (M) 6:08:58
Marathon: Elissa Schoening 5:13:08
Half-Marathon: Jake Johnson (M) 1:32:03, Hannah Lee Cullum (F) 1:54:49
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
Rio Colorado Ultra Slam
Every Fit Foundation finish counts toward the Rio Colorado Ultra Slam. Complete 250 km across our 2026 races and the buckle is yours, in addition to your individual race awards.
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 (Buckle for Ultra Distances)
Unique medal for all finishers and buckles for ultra-distance runners.
A single 250K finish also qualifies you for the Ultra slam buckle outright.
Aid Stations
Fully stocked with nutrition and hydration. Our main aid station at the start/finish hub is fully stocked with hot food, fruit, pickle juice, cold drinks, and more. This is your primary fueling point each loop. On-course aid stations provide water and light supplies to keep you moving between loops. Plan to refuel at the hub each time you come through.
Support
On-course and at finish line
Pacing Allowed for Ultra Distances
Pacers are allowed for the 250K (after mile 62), 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
- Snacks
- Community service hours
- Future race credit
Shifts Available:
- Morning: 7:00 AM - 1:00 PM
- Afternoon: 1:00 PM - 6:00 PM
- Evening: 6:00 PM - 11:00 PM
Email: [email protected] to volunteer
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!
Rucking is covering ground with a loaded pack. Same course as the half marathon, same start, same finish line, same cutoff. The only difference is what you are carrying and who you are racing.
Ruckers are scored as their own division with their own results and their own awards. You are not competing against the runners and they are not competing against you.
- Weigh in before the start. Bring your pack to the start area at least 30 minutes before your wave. We weigh it, we tag it, you go.
- Water does not count. Your hydration, food, phone and layers are on top of the minimum. The weight is dry weight.
- Any weight is fine. Ruck plates, bricks, sand, books, dumbbells. It has to be secure and it has to stay in the pack for the whole course.
- You finish with what you started with. Weight is checked again at the finish. Anything under the minimum moves you out of the ruck division.
- Carry it yourself. No handing your pack off, no dragging, no wheels.
- Run, walk, or anything between. There is no rule about how you move, only about what you carry.
- Rucking counts toward your Run the River mileage exactly the same as running. Thirteen point one miles is thirteen point one miles.
A loaded pack on a trail is harder than the same distance on your feet, and most people go out too quick. A few things that help:
- Train with the weight before race day. Even two or three loaded walks makes a difference to your shoulders.
- Get the load high and tight against your back. Weight that sits low and swings will wreck you by mile six.
- Wear the socks and shoes you have already tested. Rucking changes how your feet hit the ground.
- Pack the weight so it cannot shift. Movement inside the pack is the most common reason people stop.
Your Race at a Glance
Event Opening laps Main Loops Total 5K 2 × 1.6 mi – 3.2 mi 10K 4 × 1.6 mi – 6.4 mi Half Marathon & Ruck 2 × 6.7 mi – 13.4 mi Marathon 3.7 mi 2 26.3 mi 50K 6.7 + 1.6 mi 2 30.9 mi 50 Mile 3 × 1.6 miNight Loop 5pm–6am
Night Loop 5pm–6am
Night Loop 5pm–6am
The Four Loops & GPX Downloads
Rules of the Course
Course map
Train with a club
Run clubs near Cedar Creek to train with before race day.
Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.