
Mustang Marathon (Hill Country Trivium) Road Race
Marble Falls, TX
50K, Marathon, Half Marathon, 10K, 5K
The Dinosaur Run consists of alternating 5k loops with options including 5K, 10K, 2 Hour, 4 Hour, 6 Hour, and 24 Hour options.
5K: One 5K loop
10K: One of each 5K loops
2 Hour: How many alternating 5K loops can you do before time runs out?
4 Hour: How many alternating 5K loops can you do before time runs out?
6 Hour: How many alternating 5k loops can you do before time runs out?
24 Hour: How many alternating 5k loops can you do before time runs out?
The race takes place at Twin Buttes in San Angelo TX. If you are doing a distance with alternating loops, you must alternate correctly in order to be eligible for an age group award (for example, if you do the 6 hour and you do the same loop twice in a row, you will not be eligible for an age group award).
24 Hour Timed Race
Tier 2, until Nov 7, 2026
$60
6 Hour Timed Race
Tier 2, until Nov 8, 2026
$42
4 Hour Timed Race
Tier 2, until Nov 8, 2026
$40
2 Hour Timed Race
Tier 2, until Nov 8, 2026
$35
10K Run
Tier 2, until Nov 8, 2026
$34
5K Run
Tier 2, until Nov 8, 2026
$34
Registration opens
Jun 19, 2026
Tier 1 ends
Sep 18, 2026
Race day
Nov 6, 2026
Tier 2 ends
Nov 7, 2026
Registration closes
Nov 8, 2026
Tier 2 ends
Nov 8, 2026
Registration openings and major changes, like a new date or a cancellation.
Your aid stations, pacing, nutrition, and crew in one plan.
Build my planAre you the race director for Dinosaur Run?
Claim this race to manage registration, volunteers, and race day.
Listed from RunSignUp. Checked Nov 1, 2026.