Crewable logoCrewable
Big Bend Ultra
100K55K35K20K10KRegistration open

Big Bend Ultra

Terlingua, Texas950 spots
Entry from
$125
Days to go
103
Register from $125 on RunSignUptrailroots.com

At a glance

Date
Jan 17, 2027
Location
Terlingua, Texas
Distances
100K, 55K, 35K, 20K, 10K
Registration
Registration open until Jan 17, 2027, via runsignup.com
Official site
trailroots.com
Listed from
RunSignUp
Last checked
Oct 5, 2026

Plan this race for free

Aid stations, cutoffs and pacing in one plan, with the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.

Build my plan

About this race

In 2004, a wild idea was hatched: an ultra trail race in Big Bend. It had never been done. The logistics were impossible. Big Bend national and state parks are huge: over 300,000 acres and several hours from San Antonio. Water is scarce. Fuel is scarce. Transportation is scarce. The isolation also means it has lowest light pollution of any park in the lower 48 states: making it a fantastic place for stargazing. This was the beginning of a truly great event that has been held annually ever since. This year Carroll Voss, Erik Stanley, and the team of volunteers and competitors with Trail Roots are looking forward to the best race yet.

Key dates

Registration opens

Jul 4, 2026

Tier 1 ends

Sep 27, 2026

Tier 2 ends

Nov 15, 2026

40d

Registration closes

Jan 17, 2027

103d

Race day

Jan 17, 2027

103d

Tier 3 ends

Jan 17, 2027

103d

Pricing

100K

Tier 2, then $280 from Nov 15, 2026

$240

55k

Tier 2, then $195 from Nov 15, 2026

$175

35k

Tier 2, then $160 from Nov 15, 2026

$145

20k

Tier 2, then $150 from Nov 15, 2026

$135

10k

Tier 2, then $140 from Nov 15, 2026

$125

Email me updates about Big Bend Ultra

Registration openings and major changes, like a new date or a cancellation.

Entry transfers

Can't race, or need an entry? Post it here so nobody has to ask if it's still available.

See the boardI have an entry

Similar races

  • Across the Years

    Dec 28Peoria, AZBackyard Ultra, 6 days +6

    Also 100K, 3 weeks before Big Bend Ultra, registration open

  • The Shippey Endurance Runs

    Jan 16, 2027High Ridge, MO100 mi, 100K +2

    Also 100K, the same weekend as Big Bend Ultra, registration open

  • Cowboy YETI

    Jan 23, 2027Bastrop, TX100K, 60K +3

    Also 100K, 1 week after Big Bend Ultra, registration open

  • Arc of Attrition by UTMB®

    Jan 22, 2027Perranporth, Cornwall100 mi, 100K +2

    Also 100K, 1 week after Big Bend Ultra, registration open

More 100K Races in Texas

All 100K Races in Texas
Race planning

Plan Big Bend Ultra with Crewable

Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.

Build my plan

Are you the race director for Big Bend Ultra?

Claim this race to manage registration, volunteers, and race day.

Claim your race