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

The Austin Solstice Circuit 52 Miler • 50K • Marathon • 25K • 10K • 5K • 12-Hour Solo & Relay is a looped running event in Spicewood on July 24–25, 2027, run on a 1.55-mile paved figure-eight course. Distances range from 52.7 miles (84.8 km), 50K, the marathon (26.2 miles / 42.2 km) and 25K down to 10K and 5K, plus a 12-hour solo run/walk and a relay format.

The marathon and 25K start at 7:00 a.m. on July 24 and the 10K and 5K at 7:00 a.m. on July 25, while the 52.7-mile solo, the 50K, the 12-hour solo and the 25K, 10K and 5K night runs start at 7:00 p.m. on July 24. Suitable for all levels, the event focuses on both competition and scenery. The smooth asphalt course is marked for visibility and divided into a main loop and an upper loop, making it easy to run by day or night.

Amenities include an aid station, restrooms, camping spots, ample parking and commemorative bandanas for finishers. The relay format encourages teamwork, while the night race adds to the appeal, blending community, challenge and after-dark adventure.