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Ultras · US · CO

High Lonesome 100

On the calendar
The date is set. Entry has not opened.
Race dateJuly 16-17, 2027
Duration2 days
Whenin 273 days
First held2017

Who's going to High Lonesome 100?

Free. You can start with nothing.

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.
The race

What this one is

The High Lonesome 100 is a hundred mile loop through the southern end of the Sawatch Range in the Colorado Rockies, starting and finishing in a meadow at the base of Mount Princeton. It crosses five alpine passes and two ghost towns, and takes in 27 miles of the Continental Divide Trail and 35 miles of the Colorado Trail, climbing 23,300 feet and topping out at 13,100. Runners have 37 hours. Every aid station is captained by someone who has run a hundred miles themselves.

Caleb Efta began piecing the course together from maps in the Sawatch in the summer of 2015, and the race was given the name High Lonesome in the autumn of 2016. The first running was in 2017. The 2020 edition was cancelled for the COVID-19 pandemic. From 2023 the overall cutoff moved from 36 hours to 37, after the race found that finishers between 2018 and 2022 were averaging about two hours for the final 7.3 mile segment where the old cutoff allowed 1.25. The Salida Ranger District approved a rise in the field to 250 runners, phased in 25 runners at a time and full in 2026, which was the ninth running.

Getting in

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

Lottery
Yes highlonesome100.com
Lottery opens
not checked yet
Lottery draw
not checked yet
Field cap
not checked yet
Registration
not checked yet
Qualifying
not checked yet
Minimum age
not checked yet
Transfers
not checked yet
Deferrals
not checked yet
Same race, other lines

Other distances and other years

Other years
2026
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.

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

+ 8 more.

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

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

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

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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.

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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.

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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: 18 sources for this race. Hover a source link to read the sentence it came from.
0% 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.