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Ultras · US · TX

Big Bend Ultra

23rd annual
55K · 55K
Registration open
Registration is open.
Race dateJanuary 17-18, 2027
Duration2 days
Start7:00am
Whenin 130 days
First held2005
Free, and always will be. NavRun makes money from race-day planning for runners who want it, never from this. Ultras change constantly, sometimes the morning of. Always confirm with the race director and the official website before you rely on anything here.
Distance 55K
Climb 2,545 ft
Descent not checked yet
High point not checked yet
Time limit 11:30:00
Aid stations 7
Started not checked yet
Finished not checked yet
Finish rate not checked yet
The course

Where it goes · 7 aid stations

Course line from the race's own GPX. Source file.

Thirty-five miles from the Barton Warnock Visitor Center out into Big Bend Ranch State Park and back. Four aid station stops, no crew access, no cell service, and eleven and a half hours to get round.

Zero cell phone signal. The nearest hospital (Alpine, TX) is 100 miles from the start/finish line. Significant portions of the race have no vehicle access. Portions that have vehicle access may be a several hour drive on 4x4 limited access dirt trails to reach pavement. Desert wilderness landscape provides little shelter and temperatures range from freezing at night, to sweltering in the sun. The race rates this course hard, at 176.4 on the cX scale.

The race

What this one is

The Big Bend Ultra runs on desert trails in Big Bend Ranch State Park in far west Texas, starting and finishing at the Barton Warnock Visitor Center outside Terlingua. The parks here run to over 300,000 acres and sit several hours from San Antonio: water is scarce, fuel is scarce, and there is no cell service anywhere on the course. Five distances share the one start line, from a 10K up to a 100K that is capped at 100 runners. The race area is a gold tier Dark Sky Park, so anyone still out after dark gets the best stars in Texas.

In 2004 a wild idea was hatched: an ultra trail race in Big Bend. It had never been done and the logistics were impossible. It has been held annually ever since, and the January 2027 running is the 23rd. Trail Roots, an Austin running club, puts it on now, and the race's old web address, bigbend50.com, still points at it.

Getting in

Getting in Entry, lottery and what the race asks of you before race day.

Lottery
No runsignup.com
Lottery opens
not checked yet
Lottery draw
not checked yet
Field cap
not checked yet
Registration
RunSignUp runsignup.com
Qualifying
not checked yet
Minimum age
not checked yet
Transfers
not checked yet
Deferrals
not checked yet
Crew access, pacers and drop bags

The rules that shape your day Anything marked "not checked yet" is a gap in what we hold, never a no from the race.

Crew allowed
No trailroots.com
Vehicles per runner
does not apply to this race trailroots.com
Pacers
No trailroots.com
Muling
not checked yet
Drop bags
Yes docs.google.com
Cupless
Yes trailroots.com
Course marking
Fully Marked trailroots.com
Night running
not checked yet
Dogs
Not allowed trailroots.com
Headphones
not checked yet
Crew rules
No crew is allowed on the course. Vehicles are not allowed into the state park for spectators or crews, only for the designated volunteers who run the aid stations. Spectators can drive to the Contrabando aid station, and that is the only one they can reach. trailroots.com
Pacer rules
Pacers are not allowed at any distance, because of how remote the aid stations are. trailroots.com
Drop bag rules
The race provides resealable drop bags of about 3 gallons, and everything has to fit inside the bag it gives you. Label the bag with your bib number and the station it is going to. Bags come back at the start and finish the morning after the race. trailroots.com
Cutoff philosophy
The race is far from help, so the cutoffs hold: an aid station is torn down once the course behind it is clear, and anyone still out there is directed to the finish. calendar.google.com
Aid stations

Every stop, and what you get there ● yes   · no   ? nobody has checked   – does not apply to this race

Mile Station Cutoff Crew access Bag Pacer Med To next
0.00 Barton Warnock
None · EMS · no cell service
? · ? · 5.10
5.10 Waterhole
None · basic first aid · no cell service
? · · · 2.40
7.50 Whit Roy
None · basic first aid · no cell service
? · · 9.75
17.25 Whit Roy
None · basic first aid · no cell service
12:00pm · · 8.00
25.25 Contrabando
None · basic first aid · no cell service
? · · · 4.40
29.65 Waterhole
None · basic first aid · no cell service
? · · · 5.35
35.00 Finish
None · EMS · no cell service
6:30pm · ? · ?
Same race, other lines

Other distances and other years

What it looks like out there

Somebody has been out there with a camera the tables say the climb is long. these say what long feels like.

7 people have been out there with a camera or a microphone.

These are other people's work and we link straight to them. Watching costs nothing and needs no account. More of them: every race we hold, on film.

Add to this page

What you know every one of these is read by a person before it changes anything

Ran this race? Tell the next runner what you know.

Nobody sees it until we have read it. No account, no sign-in.

Leave blank if it applies to the whole race.

Leave blank if it is not about one particular stop.

Optional. Something like “Cal Street, mile 62 to 78”.

Write it the way you would say it to someone at the start line.

Optional, and it decides nothing. It only tells the next runner where this is coming from.

Optional.

Optional, and never shown on the page. Only so we can ask you a question about this note.

Leave this field blank.

See something wrong or out of date? Suggest an edit.

This changes nothing on the page on its own. Somebody checks it against the race first.

Optional. Filled in for you when you start from a specific line on the page.

Copy it as it appears, so we can find it.

The corrected value.

Required. Where it came from: the race email, the runner manual, what you saw on the day.

Optional.

Optional. A screenshot or a photo of the sign works.

Optional, and it decides nothing.

Optional.

Optional, only so we can come back to you about this correction.

Leave blank if it is about the whole race.

Leave blank if it is not about one particular stop.

Leave this field blank.

Seen a course preview or a film of this one? Send it over.

Somebody watches it before it goes anywhere near this page. What we are after is footage of this course, on the ground. If it would be just as true of any other race, it is not this.

Required. A line is plenty. Where the climbs are, what the footing does, what the last twenty miles look like.

Optional, and it decides nothing.

Optional.

Optional, and never shown on the page. Only so we can ask you a question about this one.

A YouTube link, a race report, a photo gallery, whatever it is.

Optional, and we credit them on the page.

Leave this field blank.

Have the GPX? Send us the link.

We want the address of the file the race publishes, not the file. We download it from there so the page can say where the line came from.

The page or file on the race's own site.

Optional, and only so we can ask you a question about it.

Are you the race director? Get in touch and we'll make it right.

We read every one of these and we write back. Every fact here carries the source it came from, and the way a wrong one gets fixed is a person checking it against what you tell us.

Required, because this is a conversation and we write back.

Tell us what is wrong, out of date, or missing on this page. We read every one of these and we will get back to you.

Optional.

So we know who we are writing back to.

Optional. Director, assistant, comms, whoever you are.

Leave this field blank.

Where this came from. Every fact on this page records its source and when we last checked it: 158 sources for this race. Hover a source link to read the sentence it came from.
41% of what we track for a course is filled in. The rest says "not checked yet" rather than guessing.
See something wrong or out of date? Suggest an edit
Ran this race? Tell the next runner what you know
Got footage of this course? Send us the link
Are you the race director? Get in touch and we'll make it right.
Anything else: [email protected]

Ultras change. We will tell you when this one does.

Cutoffs move, races get postponed, lotteries open and close. We read the race's own sources and record where every fact came from. Put your email in and we will send you what changed, and where we read it.

No account, and nothing to cancel.

What happens to your email. Nothing else. I do not sell it, and I will not send you anything except this race changing. One click gets you out.

I keep this catalog because the information is scattered and hard to trust. Telling you when it moves is the same job.

Ultras change. We will tell you when this one does.

Cutoffs move, races get postponed, lotteries open and close. We read the race's own sources and record where every fact came from. Put your email in and we will send you what changed, and where we read it.

No account, and nothing to cancel.

What happens to your email. Nothing else. I do not sell it, and I will not send you anything except this race changing. One click gets you out.

I keep this catalog because the information is scattered and hard to trust. Telling you when it moves is the same job.

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