Deep Cut Guide

Arthur's Rock

31 routes and 69 boulder problems · Porphyroblastic Biotite Schist · 6,677 ft

Take me there Routes ↓ Directions

Help locate these routes: survey the wall

What's here

5.5 to 5.13, mostly around 5.11.

  1. 1 5.5
  2. 1 5.6
  3. 3 5.7
  4. 3 5.8
  5. 2 5.9
  6. 5 5.10
  7. 10 5.11
  8. 5 5.12
  9. 1 5.13

VB to V12, mostly around V2.

  1. 1 VB
  2. 9 V0
  3. 6 V1
  4. 12 V2
  5. 4 V3
  6. 4 V4
  7. 8 V5
  8. 3 V6
  9. 9 V7
  10. 6 V8
  11. 1 V9
  12. 2 V10
  13. 3 V11
  14. 1 V12

Counted from the 100 climbs here that carry a grade. Shown only where there are at least 5 of them — below that the shape is noise.

How well located

Base placed (one source) 4  Position on wall known 96 

The order of the climbs along this wall is known from the open catalogue, so a few surveys go a long way: standing at Corridor Project, Kiddy Pool, Sunrise (3 climbs, about 90 seconds on South Face of Arthur's Rock) would place up to 17 more climbs between them. Survey the wall →

“Up to” because the estimate between two surveyed routes is only used when they turn out to be close enough together on the ground.

Rock, from the geologic map

Porphyroblastic Biotite Schist. about 4,000 to 541 million years old.

Characterized by abundant porphyroblasts of coarse biotite

This is the map unit under this crag's map point, read from the 1:100,000 sheet (Colton, Roger B., 1976, U.S. Geological Survey Geologic Investigations Series I-855-G). The point can be a few hundred metres from the rock, a cliff often stands on the line between two units, and at that scale a line on the map is about 100 m wide on the ground, so the wall itself may be the neighbouring unit. Every crag on this unit: Porphyroblastic Biotite Schist. Geology data: Macrostrat (CC BY 4.0), serving USGS and Colorado Geological Survey maps.

On the map since 1906

The USGS has mapped this ground since 1906. 31 historical sheets cover this crag's map point; the oldest is below.

Thumbnail of the 1906 USGS sheet covering Arthur's Rock
USGS 1:62500-scale Quadrangle for Fort Collins, CO 1906 · U.S. Geological Survey · 1906 · 1:62,500 sheet
USGS Historical Topographic Map Collection · Public domain · the record · placed by its coordinates
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Public domain, U.S. Geological Survey. The sheet shows the ground as the survey found it then, which is why a trail or road you know may be missing. Every sheet over this point, 1906 to 1980: USGS topoView.

In print since 1877

Free to read: public domain or government work. About Fort Collins as a whole, not this wall. More in the reading room.

From the archives

Photographs of this area held by the Library of Congress, oldest first. Every one carries the Library's own "no known restrictions on publication"; anything else is left out.

After the Explosion of a Ten-Ton Blast above Fort, Collins, Colorado
After the Explosion of a Ten-Ton Blast above Fort, Collins, Colorado · Keystone View Company · 1908 · stereograph
Library of Congress, Prints & Photographs Division · Public domain · the record · found by place name, not yet checked
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Big Thompson Canyon. Loveland, Fort Collins and Estes Park Road, Estes Park, Colo. · 1908 · postcard
Library of Congress, Prints & Photographs Division · Public domain · the record · found by place name, not yet checked
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Exploding a Ten-Ton Blast above Fort Collins, Colorado · Keystone View Company · 1908 · stereograph
Library of Congress, Prints & Photographs Division · Public domain · the record · found by place name, not yet checked
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Junction of Loveland and Fort Collins Road, Estes Park, Colo. · 1908 · postcard
Library of Congress, Prints & Photographs Division · Public domain · the record · found by place name, not yet checked
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

14 year old Henry in the fourth grade of the Rockwood Place School. He is four grades behind, and the teacher says it is on account of the beet work. Location: Fort Collins, Colorado · Hine, Lewis Wickes, 1874-1940 · 1915
Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Girls - one 14 years and two 12 years old in the third grade of the Rockwood Place School. Some children 7 and 8 years old in this grade. Regular age is 8 and 9. Teacher says retardation is due chiefl · Hine, Lewis Wickes, 1874-1940 · 1915
Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Views of "The Jungle," in Ft. Collins, the section in which the beet workers live when not away working the beets. In Greeley, this segregated section is called "The Pansy Bed" (from the varied and vi · Hine, Lewis Wickes, 1874-1940 · 1915
Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

[Views of "The Jungle," in Ft. Collins, the section in which the beet workers live when not away working the beets. In Greeley, this segregated section is called "The Pansy Bed" (from the varied and v · Hine, Lewis Wickes, 1874-1940 · 1915
Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

[Views of "The Jungle," in Ft. Collins, the section in which the beet workers live when not away working the beets. In Greeley, this segregated section is called "The Pansy Bed" (from the varied and v · Hine, Lewis Wickes, 1874-1940 · 1915
Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Harvesting barley with combined harvester and threshing machine drawn by tractor, near Fort Collins, Colo. · Keystone View Company. · 1919 · stereograph
Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

3 more at the Library of Congress.

Photographs near this crag

Taken within 1.5 km of this crag's map point and published under a licence that lets us show them, from Wikimedia Commons. The coordinates say where the camera was, not what it was pointed at, so some of these will be the creek or the trail rather than the rock.

Arthur's Rock Summit
Arthur's Rock Summit · Peter J. Caprio · 2023 · 169 m from the crag's map point
Wikimedia Commons · CC BY-SA · the record · placed by its coordinates
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Lomatium orientale - Cecelia Alexander 01 · Cecelia Alexander https://www.inaturalist.org/people/aspidoscelis · 2024 · 1,390 m from the crag's map point
Wikimedia Commons · CC0 · the record · placed by its coordinates
Report this item

Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.

Routes

Also within 3 km

Straight line between the two crags' map points, each of which can be some way from its rock. For when this wall is full, or the sun has found it.

Photos from climbers

No photos here yet. If you're at the crag, yours would be the first.

Pick a photo from your camera roll rather than taking one here: a picture taken inside a browser usually has no location saved in it, and we check that the photo was taken at this crag before publishing it. Photos of guidebook pages and topos are refused — they're the author's work. By sending one you're letting us publish it.

Nobody reviews these before they appear, so anyone can report one and it's hidden straight away — including you, if you change your mind, and including a photographer who finds their own picture here.

Taken at the crag by climbers and published as they sent them. Each one's own location had to be within 0.5 km of this crag before we accepted it. See something that shouldn't be here? Use Report this photo under it and it's hidden at once. Anything else, write to us.

Sun today
sun 07:20-14:00
Wall faces SE (USGS elevation). Shade from the surrounding terrain is counted.
Partly enclosed: the skyline averages 7° above horizontal.
Crags by sun and shade →
Rain & forecast
0 mm of rain in the last 48 hours.
11-11 60°/39° · 0.0 mm · 11 mph · pm storms 0% 11-12 57°/41° · 0.0 mm · 12 mph · pm storms 0% 11-13 56°/39° · 0.0 mm · 8 mph · pm storms 0%
Open-Meteo, fetched 2026-11-11 18:40 UTC

Conditions reported

Nothing reported recently.

Report what you see

Reports are dated and fade on their own: wet rock after 3 days, a bad bolt after a year. No names, no text.

Access & safety

Emergency: call 911. Read out your location: Works without signal. If GPS fails, this crag's approximate map point is 40.56690 N, 105.18720 W (Arthur's Rock). That point can be off by hundreds of metres, so say so.

The map point for this crag is on land managed by Colorado Parks & Wildlife (state), in Lory State Park. It lies inside state park.

Land manager from USGS PAD-US (public domain), read 2026-09-29. It is the manager of the crag's map point, which can be a long way from the wall. What you may do on the rock is the manager's to say, not ours.

Rules for all Colorado Parks & Wildlife land

Fees
Every Colorado state park requires an entrance pass for motor vehicles. A daily vehicle pass is $4 to $17 depending on the park; an individual pass covers entry on foot or bike.
Reservations
Eldorado Canyon runs timed-entry vehicle reservations on summer weekends and holidays; see the park's own page. Other parks do not require one to enter.
Permits
A daily pass is valid until noon on the day after purchase. The annual Keep Colorado Wild pass is $29 and is bought with a vehicle registration.

Read on Colorado Parks & Wildlife's own pages, checked 2026-09-29 by John Crawford. What they require, in full, or their own climbing page. These apply to the manager's whole holding; anything specific to this crag is above.

Nearby, from OpenStreetMap

Toilets
1,103 m away (map)
Campsite
Backcountry Site 1, 455 m away (map)

Distances are a straight line from this crag's map point, which can itself be hundreds of metres off; a road may be much longer. Mapped by OpenStreetMap contributors (ODbL), so a toilet missing here may simply be unmapped. Parking here is what OSM has drawn nearby, not a guidebook's directions.

Keep Deep Cut Guide free

No ads, no paywall, no account. You can chip in directly to help keep it running.