Trail Races & Ultramarathons in Texas
As of October 6, 2026, Crewable lists 87 upcoming trail races and ultramarathons in Texas from October 2026 to August 2027. The next is 4th Annual Del Rio Marathon on October 10 in Del Rio. Registration is open for 46.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
With aid station data
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October 2026
31 racesAutumn Harvest 50K • 20-Miler • 10-Miler • 5-Miler • Full • Half • 10K • 5K • Big Bastrop Backyard Ultra (Last Runner & Last Rucker Standing)
Bastrop, TXBackyard Ultra50K+7Open until Oct 9from $65.99The Mammoth Trail Run 2026 - 100K / 50K / 25K / 10K / 5K and Mighty Mammoth 1K Kids Dash
Glen Rose, TX100K50K+3Open until Oct 11from $35Fields of Gold 50K • Marathon • Half Marathon • 12 Hour • 1 Hour • 10K • 5K
Marble Falls, TX50 mi12 hr+5Open until Oct 22from $49.99
November 2026
17 racesMustang Marathon (Hill Country Trivium) Road Race
Marble Falls, TX50KMarathon+3Open until Nov 9from $104th Annual Monk Strong Memorial Rugged Trail Run & SO MUCH MORE!
Stephenville, TX10K5KOpen until Nov 14from $20Colorado River Run: 100-Mile & 50-Mile Ultra, 50K, Marathon, Half-Marathon, 10K and 5K
Marble Falls, TX250K100 mi+6Open until Nov 27from $15
December 2026
9 racesJanuary 2027
7 racesFebruary 2027
5 racesMarch 2027
4 racesApril 2027
4 racesMay 2027
3 racesJune 2027
4 racesJuly 2027
2 racesAugust 2027
1 raceQuick answers
What is the next trail race or ultramarathon in Texas?
4th Annual Del Rio Marathon, on Saturday, October 10, 2026, in Del Rio. Distances: Marathon.
How many trail races and ultramarathons in Texas have open registration?
46 of the 87 list registration as open as of October 6, 2026, including Autumn Harvest 50K • 20-Miler • 10-Miler • 5-Miler • Full • Half • 10K • 5K • Big Bastrop Backyard Ultra (Last Runner & Last Rucker Standing), Barrio Dogs Tails & Trails 2026 and Caveman Challenge at Waterloo Lake.
How many of the trail races in Texas are ultramarathons?
69 of the 87 are ultramarathons (longer than a marathon, or a backyard, timed or 200+ mile format). The other 18 are shorter races.
What is the busiest month for trail races and ultramarathons in Texas?
October 2026, with 31 of the 87. November 2026 follows with 17.
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