4 aidTrail Races & Ultramarathons Near Austin, TX
As of October 6, 2026, Crewable lists 27 upcoming trail races and ultramarathons near Austin, TX from October 2026 to July 2027. The next is Autumn Harvest 50K • 20-Miler • 10-Miler • 5-Miler • Full • Half • 10K • 5K • Big Bastrop Backyard Ultra (Last Runner & Last Rucker Standing) on October 10 in Bastrop, TX. Registration is open for 16.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
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October 2026
9 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 $65.99Fields 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
6 racesMustang Marathon (Hill Country Trivium) Road Race
Marble Falls, TX50KMarathon+3Open until Nov 9from $10Colorado 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
4 racesJanuary 2027
3 racesFebruary 2027
1 raceMay 2027
1 raceJune 2027
2 racesJuly 2027
1 raceQuick answers
What is the next trail race or ultramarathon near Austin, TX?
Autumn Harvest 50K • 20-Miler • 10-Miler • 5-Miler • Full • Half • 10K • 5K • Big Bastrop Backyard Ultra (Last Runner & Last Rucker Standing), on Saturday, October 10, 2026, in Bastrop, TX. Distances: Backyard Ultra, 50K, Marathon.
What is the closest trail race or ultramarathon to Austin?
2027 Texas Ultra Series in Multiple Cities, TX, about 7 miles from Austin, on December 31, 2026.
How many trail races and ultramarathons near Austin, TX have open registration?
16 of the 27 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), Texas Backyard Ultra Series and Trailway Trail Race.
How many of the trail races near Austin, TX are ultramarathons?
24 of the 27 are ultramarathons (longer than a marathon, or a backyard, timed or 200+ mile format). The other 3 are shorter races.
What is the busiest month for trail races and ultramarathons near Austin, TX?
October 2026, with 9 of the 27. November 2026 follows with 6.
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