The Race Radar

Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay

Spicewood, Texas
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay official race logo - running event in Spicewood, Texas
DATE:
TIME:
LOCATION:
Spicewood, Texas
PRICE:
Free
DISTANCES:
9 Events: 26.2 Miles, 3.1 Miles, 15.5 Miles, 6.2 Miles, 25K, 52.7 Miles, 31 Miles, 6.2 Miles, 3.1 Miles

About Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay

Race photo 1

Austin Solstice Circuit Challenge

The Fastest Summer Ultramarathon in Texas

July 25 & 26, 2026 | Pace Bend Park, Lake Travis

Set a Summer PR!

Scenic Hill Country Course

Experience the breathtaking beauty of the Texas Hill Country as you run on smooth paved roads winding through majestic oak trees. With Lake Travis as your backdrop, this picturesque route combines natural beauty with the perfect running surface for speed and comfort.

 

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Set your sights on a personal record at the Austin Solstice Circuit Challenge. This unique event features a perfectly engineered 1.64-mile paved loop with an elevation gain of just 33ft at scenic Pace Bend Park on Lake Travis, designed for speed and performance even in July.

Race Distances

52.7 Mile Race

Loops: 32
Distance: 52.7 mi
Start: 7:00 PM 07/25

 

50K

Loops: 19
Distance: 31.0 mi
Start: 7:00 PM 07/25

Marathon (USATF Certification code: TX25015LAB)

Loops: 16
Distance: 26.35 mi
Start: 7:00 PM 07/25

25K

Loops: 10
Distance: 15.5 mi
Start: 7:00 PM 07/25;             7:00AM 07/26
 
 

10K

Loops: 4
Distance: 6.2 mi
Start: 7:00 PM 07/25;
7:00 AM 07/26

5K

Loops: 2
Distance: 3.1 mi
Start: 7:00 PM 07/25
7:00 AM 07/26

12-Hour Relay

2-Person Teams
The Ultimate Night-Shift Team Challenge.
Grab your teammate and conquer the dark together.
Start: 7:00 PM 07/25

Why Choose This Race?

Fast, PR-Friendly USATF Certified Marathon Course (Boston Qualifier)

Unlike typical Texas summer ultras with brutal heat and technical trails, our smooth asphalt loop with minimal elevation gain creates ideal conditions for record-setting performances. This is a USATF-certified course: Certification code: TX25015LAB.

Evening Start Format

Race as the sun sets and July's magnificent Buck Moon rises over the limestone bluffs. Our strategic evening start times for longer distances mean cooler temperatures when you need it most.

Pacers Allowed

While we won't be providing official pacing groups for the Austin Solstice Circuit Challenge due to our size, we enthusiastically welcome personal pacers for both the Marathon, 50K and 52.7 Mile Solo events. Personal pacers can join Marathon and 50K participants after 8 loops and 52.7 Mile runners after 16 loops (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, but the loop format makes it particularly convenient for your support crew to join when you need them most. We find this flexibility is especially appreciated by first-time marathoners and ultra runners who benefit from personalized support during the challenging later miles as day turns to evening.

 

 Pickup Information:

Saturday Packet Pickup:


Available from 4:30 PM to 6:30 PM.


Race Day Pickup:


For those unable to attend on Saturday or who prefer to pick up on race day, same-day packet pickup will be available Sunday morning from 5:30 AM to 6:30 AM.

12-Hour Overnight Relay (2-Person Teams)

Smash out alternating single loops, swap out every hour, or split the night into two massive blocks; your team controls the strategy.

The relay kicks off at 7:00 PM Saturday and ends exactly at 7:00 AM Sunday.
All transitions take place right at the main canopy timing mat next to the team layout area. You will pass off your team's timing chip to your partner to trigger the next leg.

Team Registration: The first member to sign up will create the team name and pay the full registration fee.
Teammate Invite: Once the team is created, the second member can register and join the roster. (Note: You can choose to split the cost evenly through RunSignup’s automatic split-pricing feature at checkout!)
What’s Included: Every single relay participant receives a finisher medal, custom race swag, and full access to the overnight aid hub support.

Maximum Roster: Strictly limited to 2 runners per team.Parking Limitation: To ensure we don't overflow our park lot near Kate's and Johnson Cove, relay teams are strictly limited to one (1) vehicle per team. Please plan to carpool to the venue!

Course Details

The distinctive figure-8 course winds through the breathtaking Hill Country landscape of Pace Bend Park, featuring limestone bluffs, majestic oak trees, and views of Lake Travis. The smooth asphalt surface throughout makes it perfect for both day and night running, with the main loop connecting to a smaller upper loop.

  • Surface: 100% smooth, paved asphalt – ideal for consistent pacing
  • Elevation: Minimal gain per loop – gentle, predictable terrain
  • Loop Length: 1.64 miles in a figure-8 configuration
  • Scenery: Limestone bluffs, oak-covered hills, and Lake Travis views
  • Aid Station: Access every 1.64 miles at the start/finish hub
  • Marking: Fully marked with reflective markers for nighttime visibility

"Whether you're chasing a PR, a qualifying time, or simply want to experience the joy of running fast through a Texas summer night beneath towering oaks and limestone cliffs, the Solstice Circuit Challenge offers a rare opportunity to push your limits under optimal conditions."

Amenities

Aid Station

Fully stocked station at the start/finish hub

Restrooms

Convenient toilet vault facilities

Camping

First-come, first-served sites surrounding the course

Parking

Multiple areas for easy access

Finisher Awards

Medals and custom challenge coins for all finishers

 Commemorate your achievement with a premium custom-designed medal featuring Lake Travis. These coins are part of the Race Austin Series: Collector's Challenge, which allows you to exchange three same-tier coins from different Fit Foundation races for a complimentary race entry of the same tier.

 

Race Austin Coin Challenge Race Austin Coin Challenge Race Austin Coin Challenge

Join Us for an Unforgettable Experience

Race from sunset to stars beneath the Buck Moon on the fastest summer ultra course in the Texas Hill Country.

REGISTER NOW!

Ready to prepare? Check out our comprehensive training guide designed specifically for the Solstice Circuit Challenge.

 

 

Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Austin Solstice Circuit Challenge The Fastest Summer Ultramarathon in Texas July 25 & 26, 2026 | Pace Bend Park, Lake Travis Set a Summer PR! Scenic Hill Country Course Experience the breathtaking beauty of the Texas Hill Country as you run on smooth paved roads winding through majestic oak trees. With Lake Travis as your backdrop, this picturesque route combines natural beauty with the perfect running surface for speed and comfort.     Set your sights on a personal record at the Austin Solstice Circuit Challenge. This unique event features a perfectly engineered 1.64-mile paved loop with an elevation gain of just 33ft at scenic Pace Bend Park on Lake Travis, designed for speed and performance even in July. Race Distances 52.7 Mile Race Loops: 32 Distance: 52.7 mi Start: 7:00 PM 07/25   50K Loops: 19 Distance: 31.0 mi Start: 7:00 PM 07/25 Marathon (USATF Certification code: TX25015LAB) Loops: 16 Distance: 26.35 mi Start: 7:00 PM 07/25 25K Loops: 10 Distance: 15.5 mi Start: 7:00 PM 07/25;             7:00AM 07/26     10K Loops: 4 Distance: 6.2 mi Start: 7:00 PM 07/25;7:00 AM 07/26 5K Loops: 2 Distance: 3.1 mi Start: 7:00 PM 07/257:00 AM 07/26 12-Hour Relay 2-Person TeamsThe Ultimate Night-Shift Team Challenge. Grab your teammate and conquer the dark together. Start: 7:00 PM 07/25 Why Choose This Race? Fast, PR-Friendly USATF Certified Marathon Course (Boston Qualifier) Unlike typical Texas summer ultras with brutal heat and technical trails, our smooth asphalt loop with minimal elevation gain creates ideal conditions for record-setting performances. This is a USATF-certified course: Certification code: TX25015LAB. Evening Start Format Race as the sun sets and July's magnificent Buck Moon rises over the limestone bluffs. Our strategic evening start times for longer distances mean cooler temperatures when you need it most. Pacers Allowed While we won't be providing official pacing groups for the Austin Solstice Circuit Challenge due to our size, we enthusiastically welcome personal pacers for both the Marathon, 50K and 52.7 Mile Solo events. Personal pacers can join Marathon and 50K participants after 8 loops and 52.7 Mile runners after 16 loops (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, but the loop format makes it particularly convenient for your support crew to join when you need them most. We find this flexibility is especially appreciated by first-time marathoners and ultra runners who benefit from personalized support during the challenging later miles as day turns to evening.    Pickup Information: Saturday Packet Pickup: Available from 4:30 PM to 6:30 PM. Race Day Pickup: For those unable to attend on Saturday or who prefer to pick up on race day, same-day packet pickup will be available Sunday morning from 5:30 AM to 6:30 AM. 12-Hour Overnight Relay (2-Person Teams) Smash out alternating single loops, swap out every hour, or split the night into two massive blocks; your team controls the strategy. The relay kicks off at 7:00 PM Saturday and ends exactly at 7:00 AM Sunday.All transitions take place right at the main canopy timing mat next to the team layout area. You will pass off your team's timing chip to your partner to trigger the next leg. Team Registration: The first member to sign up will create the team name and pay the full registration fee.Teammate Invite: Once the team is created, the second member can register and join the roster. (Note: You can choose to split the cost evenly through RunSignup’s automatic split-pricing feature at checkout!)What’s Included: Every single relay participant receives a finisher medal, custom race swag, and full access to the overnight aid hub support. Maximum Roster: Strictly limited to 2 runners per team.Parking Limitation: To ensure we don't overflow our park lot near Kate's and Johnson Cove, relay teams are strictly limited to one (1) vehicle per team. Please plan to carpool to the venue! Course Details The distinctive figure-8 course winds through the breathtaking Hill Country landscape of Pace Bend Park, featuring limestone bluffs, majestic oak trees, and views of Lake Travis. The smooth asphalt surface throughout makes it perfect for both day and night running, with the main loop connecting to a smaller upper loop. Surface: 100% smooth, paved asphalt – ideal for consistent pacingElevation: Minimal gain per loop – gentle, predictable terrainLoop Length: 1.64 miles in a figure-8 configurationScenery: Limestone bluffs, oak-covered hills, and Lake Travis viewsAid Station: Access every 1.64 miles at the start/finish hubMarking: Fully marked with reflective markers for nighttime visibility "Whether you're chasing a PR, a qualifying time, or simply want to experience the joy of running fast through a Texas summer night beneath towering oaks and limestone cliffs, the Solstice Circuit Challenge offers a rare opportunity to push your limits under optimal conditions." Amenities Aid Station Fully stocked station at the start/finish hub Restrooms Convenient toilet vault facilities Camping First-come, first-served sites surrounding the course Parking Multiple areas for easy access Finisher Awards Medals and custom challenge coins for all finishers  Commemorate your achievement with a premium custom-designed medal featuring Lake Travis. These coins are part of the Race Austin Series: Collector's Challenge, which allows you to exchange three same-tier coins from different Fit Foundation races for a complimentary race entry of the same tier.   Join Us for an Unforgettable Experience Race from sunset to stars beneath the Buck Moon on the fastest summer ultra course in the Texas Hill Country. REGISTER NOW! Ready to prepare? Check out our comprehensive training guide designed specifically for the Solstice Circuit Challenge.    
Spicewood, TX

Race Events & Distances

Choose from 10 race distances available for Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay in Spicewood, TX. Registration includes timing, finisher medals, and post-race refreshments.

Marathon

26.2 Miles
Distance
26.2 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay 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 7:00:00 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 Spicewood, TX.

Golden Hour 5K Night Run

3.1 Miles
Distance
3.1 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about Golden Hour 5K Night Run

How long is the Golden Hour 5K Night Run?
The Golden Hour 5K Night Run covers 3.1 Miles.
What time does the Golden Hour 5K Night Run start?
The Golden Hour 5K Night Run starts at 7:00:00 PM.
How much does it cost to register for the Golden Hour 5K Night Run?
Registration for the Golden Hour 5K Night Run costs $0.00.
Where is the Golden Hour 5K Night Run located?
The Golden Hour 5K Night Run takes place in Spicewood, TX.

25K Night Run

15.5 Miles
Distance
15.5 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about 25K Night Run

How long is the 25K Night Run?
The 25K Night Run covers 15.5 Miles.
What time does the 25K Night Run start?
The 25K Night Run starts at 7:00:00 PM.
How much does it cost to register for the 25K Night Run?
Registration for the 25K Night Run costs $0.00.
Where is the 25K Night Run located?
The 25K Night Run takes place in Spicewood, TX.

Golden Hour 10K Night Run

6.2 Miles
Distance
6.2 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about Golden Hour 10K Night Run

How long is the Golden Hour 10K Night Run?
The Golden Hour 10K Night Run covers 6.2 Miles.
What time does the Golden Hour 10K Night Run start?
The Golden Hour 10K Night Run starts at 7:00:00 PM.
How much does it cost to register for the Golden Hour 10K Night Run?
Registration for the Golden Hour 10K Night Run costs $0.00.
Where is the Golden Hour 10K Night Run located?
The Golden Hour 10K Night Run takes place in Spicewood, TX.

12-Hour Relay (Teams of 2)

Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about 12-Hour Relay (Teams of 2)

How long is the 12-Hour Relay (Teams of 2)?
The 12-Hour Relay (Teams of 2) covers Distance varies.
What time does the 12-Hour Relay (Teams of 2) start?
The 12-Hour Relay (Teams of 2) starts at 7:00:00 PM.
How much does it cost to register for the 12-Hour Relay (Teams of 2)?
Registration for the 12-Hour Relay (Teams of 2) costs $0.00.
Where is the 12-Hour Relay (Teams of 2) located?
The 12-Hour Relay (Teams of 2) takes place in Spicewood, TX.

25K Run

25K (3.1 miles)
Distance
25K (3.1 miles)
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about 25K Run

How long is the 25K Run?
The 25K Run covers 25K (3.1 miles).
What time does the 25K Run start?
The 25K Run starts at 7:00:00 PM.
How much does it cost to register for the 25K Run?
Registration for the 25K Run costs $0.00.
Where is the 25K Run located?
The 25K Run takes place in Spicewood, TX.

52.7 Mile Solo

52.7 Miles
Distance
52.7 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about 52.7 Mile Solo

How long is the 52.7 Mile Solo?
The 52.7 Mile Solo covers 52.7 Miles.
What time does the 52.7 Mile Solo start?
The 52.7 Mile Solo starts at 7:00:00 PM.
How much does it cost to register for the 52.7 Mile Solo?
Registration for the 52.7 Mile Solo costs $0.00.
Where is the 52.7 Mile Solo located?
The 52.7 Mile Solo takes place in Spicewood, TX.

50K Run

31 Miles
Distance
31 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about 50K Run

How long is the 50K Run?
The 50K Run covers 31 Miles.
What time does the 50K Run start?
The 50K Run starts at 7:00:00 PM.
How much does it cost to register for the 50K Run?
Registration for the 50K Run costs $0.00.
Where is the 50K Run located?
The 50K Run takes place in Spicewood, TX.

Golden Hour 10K Run

6.2 Miles
Distance
6.2 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about Golden Hour 10K Run

How long is the Golden Hour 10K Run?
The Golden Hour 10K Run covers 6.2 Miles.
What time does the Golden Hour 10K Run start?
The Golden Hour 10K Run starts at 7:00:00 AM.
How much does it cost to register for the Golden Hour 10K Run?
Registration for the Golden Hour 10K Run costs $0.00.
Where is the Golden Hour 10K Run located?
The Golden Hour 10K Run takes place in Spicewood, TX.

Golden Hour 5K Run

3.1 Miles
Distance
3.1 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Relay Organizers

Frequently Asked Questions about Golden Hour 5K Run

How long is the Golden Hour 5K Run?
The Golden Hour 5K Run covers 3.1 Miles.
What time does the Golden Hour 5K Run start?
The Golden Hour 5K Run starts at 7:00:00 AM.
How much does it cost to register for the Golden Hour 5K Run?
Registration for the Golden Hour 5K Run costs $0.00.
Where is the Golden Hour 5K Run located?
The Golden Hour 5K Run takes place in Spicewood, 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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