Run Rabbit Run
14th Annual Run Rabbit Run 100 / 19th Annual Run Rabbit Run 50
100 Mile Tortoises
Full
Entry has closed for this year. Both the 100-mile (350 cap, Tortoises+Hares combined per the registration page) and 50-mile (200 cap) fields are full for 2026; UltraSignup waitlists are open for both. Bib numbers/division lock on Sept 7, 2026; UltraSignup registration/waitlist activity closes Sept 15, 2026. Drop-bag pickup and the awards ceremony happen the following morning, Sunday Sept 20, 2026, after the last runner cutoff.
Race dateSeptember 18-19, 2026
Duration2 days
Whenin 9 days
First held2007
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
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Climb
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Descent
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High point
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Time limit
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Aid stations
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Started
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Finished
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Finish rate
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The race
What this one is
Two ultramarathons (50 mile and 100 mile) starting and finishing at the base of the Steamboat Ski Area in Steamboat Springs, Colorado, on trails of the Routt National Forest crossing Buffalo Pass and running past Fish Creek Falls, Long Lake and (100 mile only) Emerald Mountain and downtown Steamboat. The 100 mile race runs two divisions from different start times: Hares (competing for prize money, 1 PM start, 30-hour cutoff, no pacers) and Tortoises (9 AM start, 36-hour cutoff, pacers allowed from designated points).
The Run Rabbit Run 50 began in 2007, started by Fred Abramowitz as a charity run benefiting northern Colorado kids and causes; Betsy Kalmeyer designed the original 50 mile course (since changed). Paul Sachs became co-race director in 2008. The 100 mile race, run in Hare/Tortoise divisions and offering the highest purse of any 100-mile trail ultra in the world, began in 2012. Since 2012 the race has donated almost $700,000 to northern Colorado non-profits.
Getting in
Getting in
Entry, lottery and what the race asks of you before race day.
- Lottery
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No
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- Lottery opens
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- Lottery draw
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- Field cap
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- Registration
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UltraSignup
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- Qualifying
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- Minimum age
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- Transfers
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No
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- Deferrals
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No
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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
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- Vehicles per runner
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- Pacers
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- Muling
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- Drop bags
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- Cupless
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- Course marking
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- Night running
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- Dogs
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- Headphones
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- Crew rules
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- Pacer rules
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- Drop bag rules
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- Cutoff philosophy
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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.
49 people have been out there with a camera or a microphone.
+ 41 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
Ran this race? Tell the next runner what you know.
Nobody sees it until we have read it. No account, no sign-in.
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.
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.
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.
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.
Where this came from.
Every fact on this page records its source and when we last checked it: 34 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.
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.
Running this one?
NavRun builds your pacing from your own training, then turns it into a plan your crew can follow: when to leave and where to park.
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