Mustang Marathon (Hill Country Trivium) Road Race

About the Event

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. Each race takes place on a paved surface involving a true "Out & Back" course on country roads with rolling hills, formidable climbs & gorgeous views. All races begin & end at the Marble Falls High School’s Mustang Stadium. In addition to various race perks, all finishers will receive pie from the legendary Bluebonnet Cafe upon crossing the finish line!

While every racer will get some cool swag, October 16th is the deadline to get a shirt.

Races Offered

Mustang Marathon 13.1mi

Nov 08, 2026

straighten

Distance — 13.1 Miles

terrain

Type — Running

timer

07:00

sell

$63.00

Mustang Marathon 26.2mi

Nov 08, 2026

straighten

Distance — 26.2 Miles

terrain

Type — Running

timer

07:00

sell

$77.00

Mustang Marathon 50k

Nov 08, 2026

straighten

Distance — 50K

terrain

Type — Running

timer

07:00

sell

$84.00

Mustang Marathon 10k

Nov 08, 2026

straighten

Distance — 10K

terrain

Type — Running

timer

08:00

sell

$45.00

Mustang Marathon 5k

Nov 08, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

08:30

sell

$28.00

Mustang Marathon Youth 1-Mile Run (12 & Under)

Nov 08, 2026

straighten

Distance — 1 Miles

terrain

Type — Running

timer

09:30

sell

$10.00

Weather History

These values represent the 3-year monthly averages for November in Marble Falls.

thermostat Temperature

11.5° / 22.7°

wb_sunny Feels like

9.6° / 20.8°

light_mode Avg sunshine hours

8h 1m

water_drop Avg rainfall

2.3 mm

ac_unit Avg snowfall

—

air Avg wind speed

10.4 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Low (2.0)

humidity_mid Humidity

66.5%

wb_twilight Sunrise

07:59

nightlight Sunset

18:36

About Marble Falls

Learn more about the host city, Marble Falls.

Marble Falls is a city in Burnet County, Texas, United States. As of the 2020 United States Census, the city population was 7,037. The 2024 population was estimated to be 9,413. Lake Marble Falls is part of the Highland Lakes on the Colorado River, the largest chain of lakes in Texas. Marble Falls was founded by Adam Rankin Johnson in 1887, a former Indian fighter and Confederate general.