Is crew access allowed on the 50K course?

Yes, crew access is allowed on the 50K course.

Are drop bags allowed on the 50K course?

Yes, drop bags are allowed on the 50K course.

What is the cutoff time for the 50K course?

The overall time limit for the 50K course is 14 hours from the start. There is a 16 hour time limit for the 100k & 14 hour for the 50k, which will make the shorter race hiker friendly. If this sounds like your kind of fun, please join us.

Ultras · US · PA

Boulder Field 100

50K

Registration open

Registration is open.

Race dateSeptember 12, 2026

Start7:00am

When34 days ago

First held2016

Who's going to Boulder Field 100?

I'm running itPlan your weeks and your aid station times I'm crewingWhen to leave, where to park, at every stop I'm pacing or cheeringAsk your runner for their Out Here link

Free. You can start with nothing.

Official website Entry Results Aid stations Notify me if this race changes

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 50K

Climb 4,000 ft

Descent not checked yet

High point not checked yet

Time limit 14:00:00

Aid stations 8

Started not checked yet

Finished not checked yet

Finish rate not checked yet

The course

Where it goes loop · 8 aid stations

The "Mega Hike" & Ultra Run. Tackle one full loop of the Hickory Run course.

The race director's own description: "I would think it would be fair to describe this as a mid level difficulty course." The course is 90% single track and multi-use trail with about one mile of gravel road, crossing a boulder field and the mile-long, very difficult "Shades of Death" trail section, with roughly 4,000 ft of climbing over the loop.

The race

What this one is

The Boulder Field Ultra runs three distances -- an 18-mile hike/run, a 50K, and a 100K -- on a figure-eight loop through Hickory Run State Park near Jim Thorpe, Pennsylvania. The 100K is two full laps of the same 50K loop. The course crosses the park's namesake boulder field and a rugged, mile-long stretch called the Shades of Death Trail, climbing roughly 4,000 feet per 50K loop over mostly singletrack and multi-use trail with only about a mile of gravel road.

First run in 2016, Boulder Field has been held every September since at Hickory Run State Park.

Getting in

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

Lottery: No uberendurancesports.com

Lottery opens: not checked yet

Lottery draw: not checked yet

Field cap: 400 uberendurancesports.com

Registration: UltraSignup ultrasignup.com

Qualifying: not checked yet

Minimum age: not checked yet

Transfers: not checked yet

Deferrals: No uberendurancesports.com

Running, crewing, pacing or still deciding

How NavRun helps with Boulder Field 100 Fourteen hours.

You are running it

You reach Aid 4, mile 15, and you already knew this morning what time that would be.

An arrival time for all 6 stations, worked out from your own training.

Start free →

You are deciding

You find out Boulder Field 100 is months of work away, not years, and you enter.

Put in a race you have already run. NavRun shows you where this one sits from where you are.

No account needed →

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 uberendurancesports.com

Vehicles per runner: not checked yet

Pacers: not checked yet

Muling: not checked yet

Drop bags: Yes uberendurancesports.com

Cupless: not checked yet

Course marking: not checked yet

Night running: not checked yet

Dogs: not checked yet

Headphones: not checked yet

Crew rules: not checked yet

Pacer rules: not checked yet

Drop bag rules: not checked yet

Cutoff philosophy: There is a 16 hour time limit for the 100k & 14 hour for the 50k, which will make the shorter race hiker friendly. If this sounds like your kind of fun, please join us. ultrasignup.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	Start	?	?	?	?	?	5.00
5.00	Aid 1	?	●	?	?	?	5.00
10.00	Aid 2	?	●	?	?	?	2.00
12.00	Aid 3	?	●	●	?	?	3.00
15.00	Aid 4	?	●	?	?	?	6.50
21.50	Aid 5	?	●	?	?	?	4.50
26.00	Aid 6	?	○	?	?	?	5.07
31.07	Finish	9:00pm	?	?	?	?	?

Same race, other lines

Other distances and other years

Other distances: 100K
18 Miler (18 miles)

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.

One person has been out there with a camera or a microphone.

Boulder Field 2022 50K/100K Course

Course preview · 3 min

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.

Which distance? Leave blank if it applies to the whole race.

Which stop? Leave blank if it is not about one particular stop.

Give it a short title: Optional. Something like “Cal Street, mile 62 to 78”.

What do you wish someone had told you? Write it the way you would say it to someone at the start line.

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

What year? Optional.

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

Website: 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.

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

What does the page say now? Copy it as it appears, so we can find it.

What should it say? The corrected value.

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

A link that shows it: Optional.

Or a photo of it: Optional. A screenshot or a photo of the sign works.

Were you there? Optional, and it decides nothing.

What year? Optional.

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

Which distance? Leave blank if it is about the whole race.

Which stop? Leave blank if it is not about one particular stop.

Website: 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.

What does it show that the page cannot? Required. A line is plenty. Where the climbs are, what the footing does, what the last twenty miles look like.

Were you there? Optional, and it decides nothing.

What year? Optional.

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

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

What kind of thing is it?

Who made it? Optional, and we credit them on the page.

Website: 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.

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

33% 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.