From big races to Saturday morning group runs—find ultra events and connect with the local endurance sports community.
AUSTIN'S BACKYARD MARATHON
How Far Will You Go?
"So, the last shall be first, and the first last"
BRONZE TICKET QUALIFIER
Runners on Lake Travis Hill Country trail
Texas Hill Country Paradise
Nestled in the heart of the Texas Hill Country, our event takes place near Lago Vista, just 30 miles northwest of Austin. The course winds around a peninsula jutting into Lake Travis, offering stunning water views and the natural beauty of Central Texas. Experience the perfect blend of challenging terrain and breathtaking landscapes that will keep you motivated hour after hour.
Join us for Austin's Backyard Marathon & Memorial Day Remembrance Run, a unique endurance event that allows you to push your limits in the beautiful Hill Country. This officially sanctioned Backyard Ultra is not just a race, it's a test of mental fortitude, strategic pacing, and physical endurance that will challenge you in ways you've never experienced.
The Backyard Ultra Format
Last Person Standing Challenge
This is an officially sanctioned Backyard Ultra. Complete each 4.167-mile loop within 60 minutes to continue. A new loop starts at the top of each hour.
Following our successful 2025 inaugural event, we are working toward Bronze Ticket qualifying status for 2026. Check back for updates on our certification progress!
Memorial Day Remembrance Run
Set Your Own Challenge for a Memorial Day Remembrance Run
While the last runner standing wins the overall championship and qualifying spot, you're welcome to participate according to your own goals. Many runners choose to complete a specific number of loops rather than competing in the last-person-standing challenge.
You'll earn recognition based on your achievement: Complete 1 loop (4-miles) for a woodallion, 4 loops for half marathon medal, 7 loops for marathon medal, or 8+ loops for ultra medal. Simply notify race staff when you've reached your personal goal.
The Rules for the Last Runner Standing Are Simple
The course is a 4.167-mile (6.706 km) loop
A new loop starts at the top of each hour
Participants must complete each loop within the hour to continue
Runners are eliminated if they fail to complete a loop in time or choose not to start the next loop
The last person to complete a loop is declared the overall winner
Race Distance Equivalents
Half Marathon
4 Loops
13.1 miles
Marathon
7 Loops
26.2 miles
50K
8 Loops
31 miles
50 Miles
12 Loops
50 miles
100K
15 Loops
62 miles
100 Miles
24 Loops
100 miles
"This variation in terrain, from exposed shoreline paths to shaded and paved sections, will provide crucial diversity over extended hours of running. The course change also gives runners a mental reset, which can be psychologically significant in a format that tests mental endurance as much as physical stamina."
Awards
Finisher Medal
Complete at least one loop
🏅
Half Marathon Medal
Complete 4 loops (13.1 miles)
🥈
Marathon Medal
Complete 7 loops (26.2 miles)
🥇
Ultra Medal
Complete 8+ loops (33.336+ miles)
🏆
Last Person Standing
Overall winner + Bronze Ticket
👑
What's Included
Event Entry
Access to this unique endurance challenge in the Texas Hill Country
Custom Event T-shirt
Commemorative shirt to remember your achievement
Finisher's Medal
Earn a medal by completing at least one loop
Aid Station Support
Fully stocked aid stations to keep you going hour after hour
Ready to Test Your Limits?
Join us for this unique endurance challenge in the beautiful Texas Hill Country. How many loops can you complete?
REGISTER NOW!
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!
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: [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!