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50K Ultramarathon

Join us for an exhilarating race day where you'll not only challenge your limits but also enjoy a dynamic and ever-changing course layout! The welcoming environment encourages participants of all paces and fitness levels to take on their next running challenge. Adventure awaits on these scenic sun-bleached limestone bluffs and verdant courses.
Event Date:
Thursday January 1, 2026
Start Time:
8:30am CST
End Time:
6:30pm CST
Price:
$99 $85.00 Race Fee + $6.10 SignUp Fee
Registration:
Price increases to $99.99 after June 30, 2025 at 11:59pm CDT

25K Trail Run

For those seeking a shorter yet challenging distance, kick off your new year with an epic trail ultrarunning experience that takes you through varied natural scenery! Enjoy a 15.5-mile looped journey through the most scenic areas of Arkansas Bend Park, complete with a 7-hour cutoff time.
Event Date:
Thursday January 1, 2026
Start Time:
8:30am CST
End Time:
6:30pm CST
Price:
$79.99 $60.00 Race Fee + $4.60 SignUp Fee
Registration:
Price increases to $79.99 after June 30, 2025 at 11:59pm CDT

Half Marathon (13.1 miles)

The looped course winds through picturesque areas, highlighting river views, and gentle inclines, suitable for both new and experienced runners.
Event Date:
Thursday January 1, 2026
Start Time:
8:30am CST
End Time:
6:30pm CST
Price:
$65 $55.00 Race Fee + $4.30 SignUp Fee
Registration:
Price increases to $69.99 after June 30, 2025 at 11:59pm CDT

Half Marathon (13.1 miles) Ruck Division

In a bid to expand the community and embrace a broader spectrum of physical activities, the Challenge also includes a special Ruck Division within the 13.1-mile half-marathon. This division is tailored to individuals looking for a unique challenge that tests endurance, strength, and resilience, providing an alternative to traditional running. Weight Requirements: Participants must carry a weighted backpack. The minimum weight is 20 pounds for participants under 150 pounds and 30 pounds for those over 150 pounds. Weights will be verified at the beginning and end of the race.

Course: Ruck Division participants will tackle the same scenic half-marathon course, designed to be both challenging and rewarding, with the added difficulty of the weighted ruck.
Event Date:
Thursday January 1, 2026
Start Time:
8:30am CST
End Time:
6:30pm CST
Price:
$65 $55.00 Race Fee + $4.30 SignUp Fee
Registration:
Price increases to $69.99 after June 30, 2025 at 11:59pm CDT

5K Run/Walk

Event Date:
Thursday January 1, 2026
Start Time:
9:00am CST
End Time:
6:30pm CST
Price:
$39.99 $29.99 Race Fee + $2.80 SignUp Fee
Registration:
Price increases to $39.99 after June 30, 2025 at 11:59pm CDT

Last Runner Standing Ultra (24 Hour)

Challenge yourself in this unique ultra-running event that combines the strategic pacing of a backyard ultra against the beautiful backdrop of Lake Travis, this event pushes your limits.
Event Dates:
Thursday January 1, 2026 - Friday January 2, 2026
Start Time:
8:30am CST
End Time:
8:30am CST
Price:
$139.99 $99.99 Race Fee + $7.00 SignUp Fee
Registration:
Price increases to $139.99 after June 30, 2025 at 11:59pm CDT

24 Hour Endurance Challenge

Here's a two-paragraph summary of the 24-Hour Endurance Challenge event:
The 24-Hour Endurance Challenge offers runners an alternative to the competitive Last Runner Standing format, allowing participants to tackle the same scenic 4.2-mile loop along Lake Travis at their own pace. This self-directed format enables athletes to set personal distance goals, take breaks when needed, and complete as many loops as possible within the 24-hour period without hourly time constraints.
Designed for ultra runners seeking personal challenges, endurance athletes aiming for new records, and those transitioning to longer events, the challenge provides full aid station support and individual lap tracking throughout. Participants who complete at least 50 miles receive a special achievement medal in addition to the standard finisher medal, making this event perfect for those who want to discover their endurance limits in the beautiful setting of Arkansas Bend Park.
Event Dates:
Thursday January 1, 2026 - Friday January 2, 2026
Start Time:
8:30am CST
End Time:
8:30am CST
Price:
$139.99 $99.99 Race Fee + $7.00 SignUp Fee
Registration:
Price increases to $139.99 after June 30, 2025 at 11:59pm CDT

Kids 1K

Our 1K race is specially designed for our youngest athletes, ages 8 and under. This exciting event offers children a taste of competitive running in a fun, supportive environment. Guardians are welcome to accompany their child during the 1K. To do so, you must be registered for the 5K. This ensures proper event coverage and safety for all participants.
Participants will:

-Race on a safe, kid-friendly 1-kilometer course
-Cross the same finish line as the 5K runners, just like the pros
-Build confidence and develop a love for running and fitness

Watch your little ones beam with pride as they sprint across the same finish line as the older athletes. It's a perfect opportunity for families to participate together, with parents able to run the 5K while kids tackle the 1K challenge.
Open to ages 8 and under.
Event Date:
Thursday January 1, 2026
Start Time:
9:00am CST
Price:
$15 $10.00 Race Fee + $1.60 SignUp Fee
Registration:
Price increases to $15.00 after June 30, 2025 at 11:59pm CDT

5K Ruck

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 pl
Event Date:
Thursday January 1, 2026
Start Time:
9:00am CST
End Time:
6:30pm CST
Price:
$39.99 $29.99 Race Fee + $2.80 SignUp Fee
Registration:
Price increases to $39.99 after June 30, 2025 at 11:59pm CDT

10K Ruck

Event Date:
Thursday January 1, 2026
Start Time:
9:00am CST
End Time:
6:30pm CST
Price:
$49.99 $39.99 Race Fee + $3.40 SignUp Fee
Registration:
Price increases to $49.99 after June 30, 2025 at 11:59pm CDT

10K

Event Date:
Thursday January 1, 2026
Start Time:
9:00am CST
End Time:
6:30pm CST
Price:
$49.99 $39.99 Race Fee + $3.40 SignUp Fee
Registration:
Price increases to $49.99 after June 30, 2025 at 11:59pm CDT

Austin Backyard Series

15% Discount Per Event

Includes 3 of the following races.

Lake Travis New Year's Trail Challenge with Ruck options- 50K | 25K | 1/2 Marathon | 24 Hour Race /Last Runner Standing | 5K/10K | Kids 1K
Lago Vista, TX 78645 US 01/01/2026 - 01/02/2026
Pick
1
of the following events:
  • 50K Ultramarathon — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • 25K Trail Run — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • Half Marathon (13.1 miles) — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • Half Marathon (13.1 miles) Ruck Division — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • 5K Run/Walk — Jan 1, 2026 at 9:00am CST to 6:30pm CST
  • Last Runner Standing Ultra (24 Hour) — Jan 1, 2026 at 8:30am CST to Jan 2, 2026 at 8:30am CST
  • 5K Ruck — Jan 1, 2026 at 9:00am CST to 6:30pm CST
  • 24 Hour Endurance Challenge — Jan 1, 2026 at 8:30am CST to Jan 2, 2026 at 8:30am CST
Austin's Backyard Marathon & Memorial Day Remembrance Run
Leander, TX 78645 US 05/23/2026
Pick
1
of the following events:
  • Austin's Backyard Ultra — May 23, 2026 at 7:00am CDT
  • Memorial Day Remembrance Marathon — May 23, 2026 at 7:00am CDT to 5:00pm CDT
  • Memorial Day Remembrance Half-Marathon — May 23, 2026 at 7:00am CDT to 5:00pm CDT
Austin Solstice Circuit: Marathon, 52M, 50K, 25K, 10K, 5K
Spicewood, TX 78669 US 07/12/2025 - 07/13/2025
Pick
1
of the following events:
  • 52.7 Mile Team Relay — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 12:00pm CDT
  • 50K Run — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 12:00pm CDT
  • Marathon — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 12:00pm CDT
  • 25K Night Run — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 12:00pm CDT
  • 10K Run — Jul 13, 2025 at 8:30am CDT to 12:00pm CDT
  • 5K Run — Jul 13, 2025 at 8:30am CDT to 12:00pm CDT
  • 52.7 Mile Solo — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 12:00pm CDT
  • 10K Night Run — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 12:00pm CDT
  • 5K Night Run — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 12:00pm CDT
  • 12 Hour Ultra — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 7:00am CDT
Fields of Gold 50K, Marathon, Half-Marathon,10K and 5K Race
Marble Falls, TX 78654 US 10/25/2025
Pick
1
of the following events:
  • 1/2 Marathon — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT
  • 5K Trail Race — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT
  • Fields of Gold Trail Marathon — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT
  • 50K — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT

Lake Travis Running Series

5% Discount Per Event

Includes 4 of the following races.

Colorado River Run Marathon, Ultra and Taco Trot
Lago Vista, TX 78645 US 11/28/2025 - 11/29/2025
Pick
1
of the following events:
  • Marathon — Nov 29, 2025 at 8:30am CST to 5:00pm CST
  • 1/2 Marathon — Nov 29, 2025 at 8:30am CST to 5:00pm CST
  • 5K Run/Walk Taco Trot — Nov 29, 2025 at 8:30am CST to 5:00pm CST
  • 5K Kids — Nov 29, 2025 at 8:30am CST to 5:00pm CST
  • 5K Ruck — Nov 29, 2025 at 8:30am CST to 5:00pm CST
  • 50 Mile Run — Nov 28, 2025 at 6:30am CST to Nov 29, 2025 at 6:30pm CST
  • 100 Mile Run — Nov 28, 2025 at 6:30am CST to Nov 29, 2025 at 6:30pm CST
Oasis Donut Dash- 10K, 8K (2025 RRCA Texas State Championship), 5K Ruck & Run
Austin, TX 78732 US 11/01/2025
Pick
1
of the following events:
  • 5K — Nov 1, 2025 at 9:00am CDT to 12:00pm CDT
  • 5K Kids — Nov 1, 2025 at 9:00am CDT to 12:00pm CDT
  • 10K — Nov 1, 2025 at 9:00am CDT to 12:00pm CDT
  • 10K Ruck — Nov 1, 2025 at 9:00am CDT to 12:00pm CDT
Lake Travis New Year's Trail Challenge with Ruck options- 50K | 25K | 1/2 Marathon | 24 Hour Race /Last Runner Standing | 5K/10K | Kids 1K
Lago Vista, TX 78645 US 01/01/2026 - 01/02/2026
Pick
1
of the following events:
  • 50K Ultramarathon — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • 25K Trail Run — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • Half Marathon (13.1 miles) — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • Half Marathon (13.1 miles) Ruck Division — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • 5K Run/Walk — Jan 1, 2026 at 9:00am CST to 6:30pm CST
  • Last Runner Standing Ultra (24 Hour) — Jan 1, 2026 at 8:30am CST to Jan 2, 2026 at 8:30am CST
  • 5K Ruck — Jan 1, 2026 at 9:00am CST to 6:30pm CST
  • 24 Hour Endurance Challenge — Jan 1, 2026 at 8:30am CST to Jan 2, 2026 at 8:30am CST
Autumn Harvest Marathon, Half-Marathon, 12 Hour Ultra and 10K
Leander, TX 78645 US 10/04/2025
Pick
1
of the following events:
  • Autumn Harvest Marathon — Oct 4, 2025 at 9:00am CDT to 9:00pm CDT
  • Autumn Harvest Half-Marathon — Oct 4, 2025 at 9:00am CDT to 9:00pm CDT
  • 12-Hour Endurance Challenge — Oct 4, 2025 at 9:00am CDT to 9:00pm CDT
  • Autumn 10K — Oct 4, 2025 at 9:00am CDT to 9:00pm CDT
Race Austin: Holiday Victory Lap - 50-Miler, 50K, Marathon, Half-Marathon, 10K, 5K
Spicewood, TX 78669 US 12/14/2025
Pick
1
of the following events:
  • The Star of Texas Marathon — Dec 14, 2025 at 8:00am CST to 5:00pm CST
  • Holiday Victory Half Marathon — Dec 14, 2025 at 9:00am CST to 3:00pm CST
  • Holiday Victory 10k — Dec 14, 2025 at 11:00am CST to 2:00pm CST
  • Holiday Victory 5K — Dec 14, 2025 at 11:00am CST to 2:00pm CST
Bluebonnet Trail Run: 50K, Marathon, Half-Marathon, 10K, 5K and Kids 2K Run
Marble Falls, TX 78654 US 03/28/2026
Pick
1
of the following events:
  • 10K Bluebonnet Trail Race — Mar 28, 2026 at 9:00am CDT to 1:30pm CDT
  • 5K Bluebonnet Trail Race — Mar 28, 2026 at 9:00am CDT to 1:30pm CDT
  • 1/2 Marathon — Mar 28, 2026 at 9:00am CDT to 1:30pm CDT
Fields of Gold 50K, Marathon, Half-Marathon,10K and 5K Race
Marble Falls, TX 78654 US 10/25/2025
Pick
1
of the following events:
  • 1/2 Marathon — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT
  • 10K Trail Race — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT
  • 5K Trail Race — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT
  • Fields of Gold Trail Marathon — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT
  • 50K — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT

Travis County Kids Race Series

5% Discount Per Event

Includes 2 of the following races.

Colorado River Run Marathon, Ultra and Taco Trot
Lago Vista, TX 78645 US 11/29/2025
  • 5K Kids — Nov 29, 2025 at 8:30am CST to 5:00pm CST
Lake Travis New Year's Trail Challenge with Ruck options- 50K | 25K | 1/2 Marathon | 24 Hour Race /Last Runner Standing | 5K/10K | Kids 1K
Lago Vista, TX 78645 US 01/01/2026
Pick
1
of the following events:
  • 5K Run/Walk — Jan 1, 2026 at 9:00am CST to 6:30pm CST
  • Kids 1K — Jan 1, 2026 at 9:00am CST
Austin Solstice Circuit: Marathon, 52M, 50K, 25K, 10K, 5K
Spicewood, TX 78669 US 07/12/2025 - 07/13/2025
Pick
1
of the following events:
  • 5K Run — Jul 13, 2025 at 8:30am CDT to 12:00pm CDT
  • 5K Night Run — Jul 12, 2025 at 7:00pm CDT to Jul 13, 2025 at 12:00pm CDT
  • Free Kids' 1K Fun Run — Jul 13, 2025 at 9:30am CDT to 12:00pm CDT
Race Austin: Holiday Victory Lap - 50-Miler, 50K, Marathon, Half-Marathon, 10K, 5K
Spicewood, TX 78669 US 12/14/2025
  • Holiday Victory 5K — Dec 14, 2025 at 11:00am CST to 2:00pm CST
Bluebonnet Trail Run: 50K, Marathon, Half-Marathon, 10K, 5K and Kids 2K Run
Marble Falls, TX 78654 US 03/28/2026
Pick
1
of the following events:
  • 5K Bluebonnet Trail Race — Mar 28, 2026 at 9:00am CDT to 1:30pm CDT
  • Kids 2K Bluebonnet Fun Run — Mar 28, 2026 at 9:00am CDT to 1:30pm CDT
Fields of Gold 50K, Marathon, Half-Marathon,10K and 5K Race
Marble Falls, TX 78654 US 10/25/2025 - 10/28/2025
  • 5K Trail Race — Oct 25, 2025 at 9:00am CDT to 7:00pm CDT

Winter Series

5% Discount Per Event

Includes 2 of the following races.

Lake Travis New Year's Trail Challenge with Ruck options- 50K | 25K | 1/2 Marathon | 24 Hour Race /Last Runner Standing | 5K/10K | Kids 1K
Lago Vista, TX 78645 US 01/01/2026 - 01/02/2026
Pick
2
of the following events:
  • 50K Ultramarathon — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • 25K Trail Run — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • Half Marathon (13.1 miles) — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • Half Marathon (13.1 miles) Ruck Division — Jan 1, 2026 at 8:30am CST to 6:30pm CST
  • Last Runner Standing Ultra (24 Hour) — Jan 1, 2026 at 8:30am CST to Jan 2, 2026 at 8:30am CST
  • 24 Hour Endurance Challenge — Jan 1, 2026 at 8:30am CST to Jan 2, 2026 at 8:30am CST
  • 10K Ruck — Jan 1, 2026 at 9:00am CST to 6:30pm CST
  • 10K — Jan 1, 2026 at 9:00am CST to 6:30pm CST
Race Austin: Holiday Victory Lap - 50-Miler, 50K, Marathon, Half-Marathon, 10K, 5K
Spicewood, TX 78669 US 12/14/2025
Pick
1
of the following events:
  • The Star of Texas Marathon — Dec 14, 2025 at 8:00am CST to 5:00pm CST
  • Holiday Victory Half Marathon — Dec 14, 2025 at 9:00am CST to 3:00pm CST
  • Holiday Victory 10k — Dec 14, 2025 at 11:00am CST to 2:00pm CST
Mansfield Dam 10 Miler, 5K, 10K Ruck and Run
Austin, TX 78732 US 01/10/2026
Pick
2
of the following events:
  • 5K — Jan 10, 2026 at 9:30am CST to 11:00am CST
  • 10K — Jan 10, 2026 at 11:30am CST to 2:30pm CST
  • 10K Ruck — Jan 10, 2026 at 11:30am CST to 2:30pm CST
  • 10 Mile — Jan 10, 2026 at 11:30am CST to 2:30pm CST

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