The Race Radar

Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay

Spicewood, Texas
Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay official race logo - running event in Spicewood, Texas
DATE:
TIME:
LOCATION:
Spicewood, Texas
PRICE:
Free
DISTANCES:
6 Events: 52.7 Miles, 26.2 Miles, 31 Miles, 27K, 6.4 Miles, 3.2 Miles

About Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay

Race photo 1

Austin Solstice Circuit Challenge

The Fastest Summer Ultramarathon in Texas

July 17 & 18, 2027 | 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 lollipop loop 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 07/17

 

50K

Loops: 19
Distance: 31.0 mi
Start: 7:00 PM 07/17

Marathon (USATF Certification code: TX25015LAB)

Loops: 16
Distance: 26.35 mi
Start: 7:00 PM 07/17

27K

Loops: 10
Distance: 16.4mi
Start: 7:00 PM 07/17             
 
 

Half-Marathon

Loops: 8
Distance: 13.1 mi
Start: 7:00 AM 07/18             
 
 

10K

Loops: 4
Distance: 6.4 mi
Start: 7:00 AM 07/18

5K

Loops: 2
Distance: 3.2 mi
Start: 7:00 AM 07/18

12-Hour Relay

2-Person Teams
The Ultimate Night-Shift Team Challenge.
Grab your teammate and conquer the dark together.
Start: 7:00 PM 07/18

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.

Course Records

52 Miler: Christopher Catzin (M) 8:09:57; Michelle Nelson (F) 10:41:02
50K:  Bradlee Turner (M) 5:35:33; Jenny Gruber (F) 6:31:25
 
Marathon: Wen-Ting Hsieh (F) 3:53:33; Rick Haddad (F) 3:54:14

 Pickup Information:

Saturday Packet Pickup:


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


Sunday Packet 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 lollipop 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: Gentle, predictable terrain
  • Loop Length: 1.64 miles in a lollipop 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 or buckles (ultra runners) for finishers

 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 • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay Austin Solstice Circuit Challenge The Fastest Summer Ultramarathon in Texas July 17 & 18, 2027 | 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 lollipop loop 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 07/17   50K Loops: 19 Distance: 31.0 mi Start: 7:00 PM 07/17 Marathon (USATF Certification code: TX25015LAB) Loops: 16 Distance: 26.35 mi Start: 7:00 PM 07/17 27K Loops: 10 Distance: 16.4mi Start: 7:00 PM 07/17                  Half-Marathon Loops: 8 Distance: 13.1 mi Start: 7:00 AM 07/18                  10K Loops: 4 Distance: 6.4 mi Start: 7:00 AM 07/18 5K Loops: 2 Distance: 3.2 mi Start: 7:00 AM 07/18 12-Hour Relay 2-Person TeamsThe Ultimate Night-Shift Team Challenge. Grab your teammate and conquer the dark together. Start: 7:00 PM 07/18 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. Course Records 52 Miler: Christopher Catzin (M) 8:09:57; Michelle Nelson (F) 10:41:02 50K:  Bradlee Turner (M) 5:35:33; Jenny Gruber (F) 6:31:25 Marathon: Wen-Ting Hsieh (F) 3:53:33; Rick Haddad (F) 3:54:14  Pickup Information: Saturday Packet Pickup: Available from 4:30 PM to 6:30 PM. Sunday Packet 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 lollipop 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: Gentle, predictable terrainLoop Length: 1.64 miles in a lollipop 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 or buckles (ultra runners) for finishers  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 • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay in Spicewood, TX. Registration includes timing, finisher medals, and post-race refreshments.

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 • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & 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.

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 • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & 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 PM.
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.

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 • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & 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.

12-Hour Run/Walk (Solo)

Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay Organizers

Frequently Asked Questions about 12-Hour Run/Walk (Solo)

How long is the 12-Hour Run/Walk (Solo)?
The 12-Hour Run/Walk (Solo) covers Distance varies.
What time does the 12-Hour Run/Walk (Solo) start?
The 12-Hour Run/Walk (Solo) starts at 7:00:00 PM.
How much does it cost to register for the 12-Hour Run/Walk (Solo)?
Registration for the 12-Hour Run/Walk (Solo) costs $0.00.
Where is the 12-Hour Run/Walk (Solo) located?
The 12-Hour Run/Walk (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 • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & 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.

27K Run

27K
Distance
27K
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay Organizers

Frequently Asked Questions about 27K Run

How long is the 27K Run?
The 27K Run covers 27K.
What time does the 27K Run start?
The 27K Run starts at 7:00:00 PM.
How much does it cost to register for the 27K Run?
Registration for the 27K Run costs $0.00.
Where is the 27K Run located?
The 27K Run takes place in Spicewood, TX.

Pacer Registration

Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay Organizers

Frequently Asked Questions about Pacer Registration

How long is the Pacer Registration?
The Pacer Registration covers Distance varies.
What time does the Pacer Registration start?
The Pacer Registration starts at 1:00:00 AM.
How much does it cost to register for the Pacer Registration?
Registration for the Pacer Registration costs $0.00.
Where is the Pacer Registration located?
The Pacer Registration takes place in Spicewood, TX.

Golden Hour 10K Run

6.4 Miles
Distance
6.4 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay Organizers

Frequently Asked Questions about Golden Hour 10K Run

How long is the Golden Hour 10K Run?
The Golden Hour 10K Run covers 6.4 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.

Half-Marathon

Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay Organizers

Frequently Asked Questions about Half-Marathon

How long is the Half-Marathon?
The Half-Marathon covers Distance varies.
What time does the Half-Marathon start?
The Half-Marathon starts at 7:00:00 AM.
How much does it cost to register for the Half-Marathon?
Registration for the Half-Marathon costs $0.00.
Where is the Half-Marathon located?
The Half-Marathon takes place in Spicewood, TX.

Golden Hour 5K Run

3.2 Miles
Distance
3.2 Miles
Start Time
Registration Fee
$0.00
https://schema.org/EventScheduledhttps://schema.org/OfflineEventAttendanceMode
Spicewood, TX
SpicewoodTX
Austin Solstice Circuit 52 Miler • 50K • Marathon • 27K • Half-Marathon • 10K • 5K • 12-Hour Solo & Relay Organizers

Frequently Asked Questions about Golden Hour 5K Run

How long is the Golden Hour 5K Run?
The Golden Hour 5K Run covers 3.2 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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