The Race Radar

Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K

Marble Falls, Texas
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K official race logo - running event in Marble Falls, Texas
DATE:
TIME:
LOCATION:
Marble Falls, Texas
PRICE:
Free
DISTANCES:
8 Events: 50 Miles, 100 Miles, 13.1 Miles, 5K, 26.2 Miles, 6.2 Miles, 5K, 31 Miles

About Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K

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!

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!
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K 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 sectionsScenery: Stunning river views, natural habitats, and diverse ecosystemsElevation: Moderate with some challenging climbs and descentsSupport: Well-stocked aid stations with friendly volunteersCommunity: 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! Children MUST be registered to participate Volunteer Opportunities     We Need Help With:   Course MarshalsAid Station SupportRegistration/Packet Pickup Assistants   All Volunteers Receive:   Race shirtMeal and snacksCommunity service hoursFuture race credit   Shifts Available:   Morning: 7:00 AM - 1:00 PMAfternoon: 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!
Marble Falls, TX

Race Events & Distances

Choose from 9 race distances available for Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K in Marble Falls, TX. Registration includes timing, finisher medals, and post-race refreshments.

50 Mile Run

50 Miles
Distance
50 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about 50 Mile Run

How long is the 50 Mile Run?
The 50 Mile Run covers 50 Miles.
What time does the 50 Mile Run start?
The 50 Mile Run starts at 8:00:00 AM.
How much does it cost to register for the 50 Mile Run?
Registration for the 50 Mile Run costs $0.00.
Where is the 50 Mile Run located?
The 50 Mile Run takes place in Marble Falls, TX.

100 Mile Run

100 Miles
Distance
100 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about 100 Mile Run

How long is the 100 Mile Run?
The 100 Mile Run covers 100 Miles.
What time does the 100 Mile Run start?
The 100 Mile Run starts at 8:00:00 AM.
How much does it cost to register for the 100 Mile Run?
Registration for the 100 Mile Run costs $0.00.
Where is the 100 Mile Run located?
The 100 Mile Run takes place in Marble Falls, TX.

Pacer Registration (50- and 100-Mile Run)

Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about Pacer Registration (50- and 100-Mile Run)

How long is the Pacer Registration (50- and 100-Mile Run)?
The Pacer Registration (50- and 100-Mile Run) covers Distance varies.
What time does the Pacer Registration (50- and 100-Mile Run) start?
The Pacer Registration (50- and 100-Mile Run) starts at 6:30:00 PM.
How much does it cost to register for the Pacer Registration (50- and 100-Mile Run)?
Registration for the Pacer Registration (50- and 100-Mile Run) costs $0.00.
Where is the Pacer Registration (50- and 100-Mile Run) located?
The Pacer Registration (50- and 100-Mile Run) takes place in Marble Falls, TX.

1/2 Marathon

13.1 Miles
Distance
13.1 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about 1/2 Marathon

How long is the 1/2 Marathon?
The 1/2 Marathon covers 13.1 Miles.
What time does the 1/2 Marathon start?
The 1/2 Marathon starts at 8:30:00 AM.
How much does it cost to register for the 1/2 Marathon?
Registration for the 1/2 Marathon costs $0.00.
Where is the 1/2 Marathon located?
The 1/2 Marathon takes place in Marble Falls, TX.

5K Run/Walk

5K (3.1 miles)
Distance
5K (3.1 miles)
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about 5K Run/Walk

How long is the 5K Run/Walk?
The 5K Run/Walk covers 5K (3.1 miles).
What time does the 5K Run/Walk start?
The 5K Run/Walk starts at 8:30:00 AM.
How much does it cost to register for the 5K Run/Walk?
Registration for the 5K Run/Walk costs $0.00.
Where is the 5K Run/Walk located?
The 5K Run/Walk takes place in Marble Falls, TX.

Marathon

26.2 Miles
Distance
26.2 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about Marathon

How long is the Marathon?
The Marathon covers 26.2 Miles.
What time does the Marathon start?
The Marathon starts at 8:30:00 AM.
How much does it cost to register for the Marathon?
Registration for the Marathon costs $0.00.
Where is the Marathon located?
The Marathon takes place in Marble Falls, TX.

10K

6.2 Miles
Distance
6.2 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about 10K

How long is the 10K?
The 10K covers 6.2 Miles.
What time does the 10K start?
The 10K starts at 8:30:00 AM.
How much does it cost to register for the 10K?
Registration for the 10K costs $0.00.
Where is the 10K located?
The 10K takes place in Marble Falls, TX.

5K Kids

5K (3.1 miles)
Distance
5K (3.1 miles)
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about 5K Kids

How long is the 5K Kids?
The 5K Kids covers 5K (3.1 miles).
What time does the 5K Kids start?
The 5K Kids starts at 8:30:00 AM.
How much does it cost to register for the 5K Kids?
Registration for the 5K Kids costs $0.00.
Where is the 5K Kids located?
The 5K Kids takes place in Marble Falls, TX.

50K

31 Miles
Distance
31 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Marble Falls, TX
Marble FallsTX
Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K Organizers

Frequently Asked Questions about 50K

How long is the 50K?
The 50K covers 31 Miles.
What time does the 50K start?
The 50K starts at 8:30:00 AM.
How much does it cost to register for the 50K?
Registration for the 50K costs $0.00.
Where is the 50K located?
The 50K takes place in Marble Falls, TX.

Registration Information

Registration is typically available online until race day (subject to capacity). Early registration is recommended for guaranteed entry and potential early bird pricing. Check with race organizers for specific event details and included amenities.

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