Austin Solstice Circuit: Marathon, 52M Relay, 50K, 25K, 10K, 5K

Austin Solstice Circuit Challenge: The Fastest Summer Ultramarathon in Texas

Set your sights on a personal record at the Austin Solstice Circuit Challenge - Texas' fastest summer ultramarathon course. This unique event features a perfectly engineered 1.55-mile paved figure-8 loop at scenic Pace Bend Park on Lake Travis, designed for speed and performance even in July.

Choose from multiple distances (5K, 10K, 25K, Marathon, 50K, or 52.7-mile relay) and experience the advantage of our evening start format for longer distances. As the sun sets and July's magnificent Buck Moon rises, you'll race on smooth asphalt with minimal elevation change - ideal conditions for record-setting performances.

Unlike typical summer ultras that battle brutal daytime heat on technical trails, our course combines:

• Fast, smooth paved surfaces
• Strategic evening start times
• Regular access to cooling aid stations
• Gentle, predictable terrain
• Perfect form-holding conditions lap after lap

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

Join us July 12, 2025, for an unforgettable sunset-to-stars adventure beneath the Buck Moon on the fastest summer ultra course in the Lone Star State.

Event Overview

The Austin Solstice Circuit Challenge at Lake Travis, is a multi-distance loop race featuring six competitive distances on a scenic 1.55-mile paved figure-8 course. This July event combines morning races for shorter distances with sunset-to-sunrise racing for longer distances, creating an unforgettable running experience for participants of all abilities.

Race Format

Participants complete a set number of loops based on their chosen distance:

52.7 Mile Relay: 34 loops - teams of 2-6 runners (7:00 PM start)
50K: 20 loops = 31 miles (7:00 PM start)
Marathon: 17 loops = 26.35 miles (7:00 PM start)
25K: 10 loops = 15.5 miles (7:00 PM start)
10K: 4 loops = 6.2 miles (8:30 AM start)
5K: 2 loops = 3.1 miles (8:30 AM start)

Course Details

The distinctive figure-8 course features a smooth asphalt surface throughout, making it perfect for both day and night running. The main loop connects to a smaller upper loop. The course is fully marked with reflective markers for nighttime visibility with clear mile markings.

Morning runners enjoy cooler temperatures for the shorter distances, while evening participants in longer distances journey through sunset into the stars. Relay teams can share the adventure, with each member running a portion of the 52.7-mile challenge. The paved course offers a consistent, predictable surface that's ideal for night running. This creates a full day of running celebration at Pace Bend Park.

Amenities

- Main aid station at the start/finish hub
- Primitive restroom facilities
- Camping sites surrounding the course perimeter (first-come, first-served basis)
- Multiple parking areas for easy access

Other Details

- Headlamp/night gear required for all evening race participants
- Custom commemorative bandana for all finishers
- Relay team transition zone at the start/finish area

Join us for this one-of-a-kind event that transforms a standard race into a memorable adventure, where community, challenge, and celebration come together under the summer night sky.