Spicewood, TX | Saturday, July 25, 2026Registration Open
Austin Solstice Circuit Challenge The Fastest Summer Ultramarathon in Texas July 25 & 26, 2026 | Pace Bend Park, Lake Travis Set a 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 07/25 7:00 AM 07/26 Carpe Diem 60 One Hour. One Sunrise. Beat the heat. Seize the morning. Earn your day. Start: 6:00 AM 07/26 7:00 AM 07/26 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