Mustang Marathon (Hill Country Trivium) Road Race
Updated
Sunday, November 8, 2026, first start 7:00 AM, in Marble Falls (2101 Mustang Dr). Distances: 1 mile, 5K, 10K, Half marathon, Marathon, 50K. Entry from $10 to $125.
- Date
- Sunday, November 8, 2026
- Start time
- 7:00 AM (earliest wave)
- Location
- 2101 Mustang Dr, Marble Falls, TX 78654
- Area
- Hill Country & Lakes, Austin
- Distances
- 1 mile5K10KHalf marathonMarathon50K
- Course
- Trail (dirt or single-track on at least part of the course)
- Price
- $10 to $125 plus the platform's processing fee
- Next price increase
- None published
- Registration
- Open. Opened March 13, online signup closes Monday, November 9, 2026
How to register
Registration is on RunSignup. Pick your distance, add any extras, and you'll get a confirmation email with your bib details.
Register on RunSignup →Race website
Course and race notes
Sunday, November 8th, 2026. Are you ready for one of the most challenging & amazing road races in all of Texas? The Mustang Marathon (formerly known as The Hill Country Trivium) is a set of 50k, full marathon, half marathon (a.k.a. Thirteener ), 10k & 5k races held in the beautiful Hill Country town of Marble Falls.
From the race's own listing. Check the race website for the course map and parking.
Source: RunSignup public race API, refreshed 2026-10-17. Details can change; the registration page is the final word.