Trail Races & Ultramarathons Near San Antonio, TX

As of October 6, 2026, Crewable lists 17 upcoming trail races and ultramarathons near San Antonio, TX from October 2026 to August 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 9.

Updated Oct 5, 2026Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites

Race calendar

October 2026

4 races

Oct10Sat
Autumn Harvest 50K • 20-Miler • 10-Miler • 5-Miler • Full • Half • 10K • 5K • Big Bastrop Backyard Ultra (Last Runner & Last Rucker Standing)
Bastrop, TX
Backyard Ultra50K+7
Open until Oct 9from $65.99
Oct10Sat
Texas Backyard Ultra Series
Bastrop, TX
Backyard Ultra
Open until Oct 9from $460
Oct23Fri
Cactus Rose Endurance Trail Race
Bandera, TX
100 mi50 mi+2
Open until Oct 24from $16
Oct24Sat
SARR Rocky Horror Trail Run
San Antonio, TX
53K27K+2
Open until Oct 24from $50

November 2026

4 races

Nov6Fri
Big Texas Ultra
Johnson City, TX
15K
Open until Nov 6from $70
Nov7Sat
Friends of Government Canyon Recharge Run 8K/15K
San Antonio, TX
15K8K
Open until Nov 7from $55
Nov7Sat
Salmagundi Trail Race
Dripping Springs, TX
52KMarathon+3
Open until Nov 8from $63
Nov14Sat
Rise El Taco Loco
San Antonio, TX
100 mi100K+4
Closes Nov 13from $50

December 2026

3 races

Dec2Wed
Dirt Circus - San Antonio
San Antonio, TX
Community Run
Dec5Sat
Longhorn Last Person Standing
Dripping Springs, TX
Backyard Ultra
Closes Dec 4from $175
Dec31Thu
2027 Texas Ultra Series
Multiple Cities, TX
50K15K+2
Completed

January 2027

1 race

Jan23Sat
Rise Alamo City Trail Ultra
San Antonio, TX
50K25K+2
Registration open

February 2027

1 race

Feb20Sat
Goliath's 50
Marble Falls, TX
50 mi50K+4
Open until Feb 20, 2027from $57

March 2027

1 race

Mar6Sat
Old Baldy Ultra
Concan, TX
50K30K+3

May 2027

1 race

May1Sat
Desert Wolf
Johnson City, TX
100K50K+3

June 2027

1 race

Jun12Sat
Fire Trail Running Festival
Spring Branch, TX
50K25K+1

August 2027

1 race

Aug13Fri
Fiesta Night Run
San Antonio, TX
5K

Quick answers

What is the next trail race or ultramarathon near San Antonio, 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 San Antonio?

SARR Rocky Horror Trail Run in San Antonio, TX, about 1 mile from San Antonio, on October 24, 2026.

How many trail races and ultramarathons near San Antonio, TX have open registration?

9 of the 17 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 Cactus Rose Endurance Trail Race.

How many of the trail races near San Antonio, TX are ultramarathons?

13 of the 17 are ultramarathons (longer than a marathon, or a backyard, timed or 200+ mile format). The other 4 are shorter races.

What is the busiest month for trail races and ultramarathons near San Antonio, TX?

October 2026, with 4 of the 17. November 2026 follows with 4.

Nearby cities

Austin27 Houston11 Dallas22

Nearby states

Arkansas18 Louisiana20 New Mexico19 Oklahoma13

More ways to browse

Trail races & ultramarathons in Texas87 Trail races & ultramarathons in the US1,638

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