Colorado River Run: 100-Mile & 50-Mile Ultra, Marathon, and 5K Taco Trot
From Fit Foundation
- Date Fri 28th November 2025 - Sat 29th November 2025
- Time 8:00AM CST
- Location Lago Vista, Texas
- Price Free - $107.00
- Races 10 races
- Distances Ultra, Marathon, Half Marathon, 5km
Event summary
Get ready for an unforgettable adventure at the Colorado River Run, organized by Fit Foundation! Taking place from November 28th to 29th, 2025, in beautiful Leander, Travis, this exciting event offers an array of race distances to suit all levels of runners. Whether you're aiming for the ultimate challenge of the 100-mile or 50-mile ultramarathon, or prefer the classic marathon (26.2 miles) or half marathon (13.1 miles), there's something for everyone. Plus, families can join in the fun with the 5K Taco Trot, a delightful 3.1-mile run/walk perfect for participants of all ages.
Set against the stunning backdrop of Arkansas Bend Park and the majestic Colorado River, runners will experience diverse landscapes, including scenic riverbanks and rugged trails. With well-stocked aid stations and a supportive community atmosphere, the Colorado River Run is designed to be both challenging and enjoyable. Don’t miss this chance to connect with nature while pushing your limits! Register now to secure your spot in this incredible outdoor event!
Set against the stunning backdrop of Arkansas Bend Park and the majestic Colorado River, runners will experience diverse landscapes, including scenic riverbanks and rugged trails. With well-stocked aid stations and a supportive community atmosphere, the Colorado River Run is designed to be both challenging and enjoyable. Don’t miss this chance to connect with nature while pushing your limits! Register now to secure your spot in this incredible outdoor event!
Organiser's Description
COLORADO RIVER RUN
RUN TO THE RIVER
100 MILES
50 MILES
MARATHON
HALF MARATHON
5K
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: 8:00 AM
Cut-off: 36 hours
The ultimate river trail adventure for endurance athletes
50 MILE ULTRAMARATHON
Start Time: 8:00 AM
Cut-off: 36 hours
Challenge yourself with breathtaking river views
MARATHON (26.2 MILES)
Start Time: 8:30 AM
Cut-off: 9 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
5K RUN/WALK (3.1 MILES)
Start Time: 8:30 AM
Cut-off: 4 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 [https://fitfoundation.org/100-mile-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!
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: [email protected] 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!
RUN TO THE RIVER
100 MILES
50 MILES
MARATHON
HALF MARATHON
5K
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: 8:00 AM
Cut-off: 36 hours
The ultimate river trail adventure for endurance athletes
50 MILE ULTRAMARATHON
Start Time: 8:00 AM
Cut-off: 36 hours
Challenge yourself with breathtaking river views
MARATHON (26.2 MILES)
Start Time: 8:30 AM
Cut-off: 9 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
5K RUN/WALK (3.1 MILES)
Start Time: 8:30 AM
Cut-off: 4 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 [https://fitfoundation.org/100-mile-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!
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: [email protected] 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!
Races
-
100 Mile Run
Incl. $7.00 Fee & T-Shirt
Fri 28th November 2025 (8:00AM CST)
$107.00
-
50 Mile Run
Incl. $5.80 Fee & T-Shirt
Fri 28th November 2025 (8:00AM CST)
$85.80
-
50 Miler (Saturday)
Incl. $6.40 Fee & T-Shirt
Sat 29th November 2025 (8:00AM CST)
$96.40
-
Marathon
Incl. $5.20 Fee & T-Shirt
Sat 29th November 2025 (8:30AM CST)
$75.20
https://fitfoundation.org/colorado-river-run-1 -
1/2 Marathon
Incl. $4.60 Fee & T-Shirt
Sat 29th November 2025 (8:30AM CST)
$64.60
https://fitfoundation.org/colorado-river-run-1 -
5K Run/Walk Taco Trot
Incl. $2.80 Fee & T-Shirt
Sat 29th November 2025 (8:30AM CST)
$32.80
-
5K Kids
Sat 29th November 2025 (8:30AM CST)
Free
Run or Walk: Kids Free with Parental Accompaniment But Registration Required. -
5K Ruck
Incl. $2.80 Fee & T-Shirt
Sat 29th November 2025 (8:30AM CST)
$32.80
Required Gear Rucksack: GORUCK Rucker recommended, but any rucksack is acceptable Must have reflective elements for visibility and safety Ruck Plates: Men: 20 lb (9.1 kg) Ruck Plate Women: 10 lb (4.5 kg) Ruck Plate Plates must be placed high in the rucksack, close to your back Additional Gear: Hydration system (water bladder or bottles) Appropriate footwear for trail conditions Weather-appropriate clothing Weight Requirements These weight requirements apply to all events (5K, 10K, and Half Marathon): Men: 20 lbs (9.1 kg) Women: 10 lbs (4.5 kg) Note: These are dry weights. Water, food, and additional gear do not count towards the weight requirement. Weight Verification Weight checks will be conducted at the start and finish of each event For longer events (10K and Half Marathon), additional checks may be performed during the course Participants must maintain the required weight throughout the entire event Additional Notes While GORUCK Ruck Plates are recommended, equivalent weights (e.g. weight vest plates) are acceptable as long as they meet the weight requirement and can be secured high in the rucksack. Safety is paramount. Ensure your ruck is properly packed and weighted to avoid injury. -
Pacer Registration (50- and 100-Mile Run)
Incl. $1.90 Fee
Sat 29th November 2025 (8:30AM CST)
$16.90
While we won't be providing official pacing groups for the race due to our size, we enthusiastically welcome personal pacers for both the 50 and 100-Mile events. Personal pacers can join 50 mile participants after the 30 mile mark and 100 Mile runners after the 50 mile mark (approximately halfway points). Each pacer must pay a $15 fee that covers park entry, administrative costs, and an official pacer bib. Pacers need to sign a waiver and wear their designated "PACER" bib while on course. Runners are responsible for arranging their own pacers. ELIGIBLE EVENTS 100 Mile Run: Pacers allowed after the 50-mile mark 50 Mile Run: Pacers allowed after the 30-mile mark Marathon and shorter distances: No pacers permitted PACER REGISTRATION All pacers must register before joining their runner Pacers must sign a liability waiver Pacers must wear the official "PACER" bib at all times while on course There is a $15 fee per pacer to cover insurance and administrative costs Pacer registration can be completed in advance online PACER RULES AND LIMITATIONS Runners may have only one pacer on the course at any given time Pacers must be at least 18 years old (16-17 year olds may pace with signed parental consent) Pacers may be switched at any official aid station Pacers must check in and out with aid station personnel when entering or leaving with a runner Pacers must remain with their runner at all times while on course Pacers must enter and exit the course only at designated aid stations Pacers are not eligible for aid station support except for water and medical emergencies Pacers cannot carry supplies or equipment for the runner (muling) Pacers must have a headlamp/lighting for nighttime pacing -
Volunteer Runner Program
Incl. T-Shirt
Sat 29th November 2025 (8:30AM CST)
Free
Volunteer Runner Program - Colorado River Run Adventure Experience the Ultimate Thanksgiving Weekend Trail Festival! Choose Your Adventure: Volunteer Friday & Race Saturday OR Race Friday & Volunteer Saturday Join our exclusive Volunteer Runner Program for the most rewarding Thanksgiving weekend ever! Design your perfect holiday weekend - support ultra-endurance athletes one day and chase your own trail goals the next. Whether you want fresh legs for racing or prefer to celebrate your Friday finish by giving back on Saturday, we've got the perfect combination for you. What You Get: -T- shirt - -All park entry fees covered - No additional costs -FREE race entry - Any distance available on your racing day (up to $100 value for 100-mile ultra!) -Volunteer meal and snacks - Stay fueled during your shift -Complete course knowledge - Master the 10-mile loop system from both perspectives -Custom finisher medal - Earn your unique Colorado River commemorative medal -Community service hours - Perfect for students and professionals -Ultra buckle eligibility - Tackle the 50 or 100-mile distance and earn the coveted finisher buckle The Experience: -Option 1: Volunteer Friday -> Race Saturday -Start your holiday weekend as part of our ultra support crew, witnessing incredible human endurance as athletes tackle our challenging 10-mile loop along the Colorado River's scenic banks and rugged trails. Experience the race from inside the aid stations and course marshal points, then use that insider knowledge for your own trail adventure on Saturday morning with fresh legs. Option 2: Race Friday -> Volunteer Saturday Jump into your own epic adventure on Friday morning, tackling the 100-mile, 50-mile, marathon, half marathon, or 5K distances. Then celebrate your achievement by giving back on Saturday, supporting fellow runners and sharing your hard-earned course knowledge as a volunteer crew member. Volunteer Commitment: Date Options: Friday, November 28, 2025 (if racing Saturday) Saturday, November 29, 2025 (if racing Friday) Shift Options: Morning Shift: 7:00 AM - 1:00 PM (6 hours) Afternoon Shift: 1:00 PM - 6:00 PM (5 hours) Roles: Aid station support, course marshaling, registration assistance, runner support Requirements: Enthusiasm for supporting trail athletes, comfortable walking on trails Race Options: Friday Ultra/Distance Options (if volunteering Saturday): 100-Mile Ultramarathon: 6:30 AM start (36-hour cutoff) 50-Mile Ultramarathon: 6:30 AM start (earn your ultra buckle!) Saturday Distance Options (if volunteering Friday): 5K Taco Trot: 8:30 AM start Half Marathon: 8:30 AM start Marathon: 8:30 AM start Special Thanksgiving Weekend Benefits: Flexible scheduling - choose the volunteer/race combination that works for you Epic Friday ultra opportunities - tackle 50 or 100 miles for the ultimate challenge Perfect holiday timing - active weekend with built-in recovery day Sunday Perfect for ultra-curious trail runners wanting the complete experience, dedicated volunteers seeking epic race challenges, or anyone wanting to maximize their Thanksgiving weekend trail adventure while giving back to the running community! Limited spots available - this flexible holiday weekend experience offers something for every trail runner! Note: Volunteer runners must complete their full volunteer shift to receive race entry. Race day must be different from volunteer day.
Reviews
Done this event?
First-hand event reviews from people who have been there, done that and got the breathable T-shirt, really help everyone choose their next event.
Add a reviewColorado River Run: 100-Mile & 50-Mile Ultra, Marathon, and 5K Taco Trot
