Loading...
Ultras · US · WA

Plain Endurance Runs

2027 Plain Endurance Runs
Plain 100K · 100K
On the calendar
The date is set. Entry has not opened. The 2027 races are set for September 18-19. Runners registered for the cancelled 2026 races receive a rollover discount.
Race dateSeptember 18-19, 2027
Duration2 days
Start5:00am
Whenin 337 days
First held1997

Who's going to Plain Endurance Runs?

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.
Distance 100K
Climb not checked yet
Descent not checked yet
High point not checked yet
Time limit 22:00:00
Aid stations 0
Started not checked yet
Finished not checked yet
Finish rate not checked yet
The course

Where it goes loop

The race

What this one is

A 100+ mile (100 Mile) and 100K self-supported ultramarathon on U.S. Forest Service trails and roads in the Cascade Mountains near Plain and Leavenworth, Washington. There are no aid stations, no course markings and no pacers; runners navigate by written directions and a paper map, filter their own water from streams, and check in with Search and Rescue volunteers at staffed checkpoints using a bib number and password. The 100 Mile is two laps of the same Deep Creek start/finish, each lap a different route; the 100K, added in 2014, is the first lap only.

Founded in 1997 by Tom Ripley and Christina Ralph of the Cascade Running Club (which also directed the Ron Herzog 50K, White River 50 Miler and Bridle Trails Twilight 8 Hour) as Washington's first 100-mile trail race, three weeks apart from Cascade Crest 100 the same year. Six runners started the first race; a snowstorm above 6,500 feet ended it early with no finishers. The first finishers were Tim Stroh and Randy Gerke in 1998; Liz McGroff became the first woman finisher in 2002. The original start/finish was Thousand Trails Lodge; in 2011 it moved to Deep Creek, with an added out-and-back spur to Thousand Trails to keep the distance the same, and the race course has not changed since. A 100K (the first loop only) was added in 2014. Wildfires cancelled the race in 2003 and 2015; in 2014 a wildfire forced a course modification that dropped the Tommy and Tyee checkpoints and added a foot-access-only Whistling Pig Meadow checkpoint; 2020 was cancelled for COVID-19; 2018, 2022 and 2026 were cancelled for wildfire. Tom Ripley and Christina Ralph retired as race directors in 2015, handing the race to long-time participant and SAR Support Team Commander Tim Stroh together with Tim Dehnhoff.

Getting in

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

Lottery
not checked yet
Lottery opens
not checked yet
Lottery draw
not checked yet
Field cap
not checked yet
Registration
UltraSignup plain100.com
Qualifying
No qualification is required, but don't take this event or distance for granted. A challenging 50 miler would be a minimum level of ability. ultrasignup.com
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
Yes docs.google.com
Vehicles per runner
not checked yet
Pacers
No plain100.com
Muling
Not allowed plain100.com
Drop bags
Yes docs.google.com
Cupless
not checked yet
Course marking
Unmarked docs.google.com
Night running
not checked yet
Dogs
Not allowed plain100.com
Headphones
not checked yet
Crew rules
Crew access is at Deep Creek only. No picture taking by crew on the course. docs.google.com
Pacer rules
not checked yet
Drop bag rules
Drop bags are accepted at Deep Creek only. Bring them to Lake Wenatchee Rec Club on Friday, or to Deep Creek on race day. docs.google.com
Cutoff philosophy
not checked yet
Same race, other lines

Other distances and other years

Other distances
Plain 100 Mile (100 Mile)
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.

4 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: 37 sources for this race. Hover a source link to read the sentence it came from.
25% 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.