Deep Cut Guide

South Fork of St. Vrain Canyon

453 routes and 25 boulder problems · granite (Silver Plume Granite) · 5,905 ft

Help locate these routes: survey the wall

What's here

5.2 to 5.13, mostly around 5.10.

  1. 1 5.2
  2. 1 5.3
  3. 4 5.4
  4. 7 5.5
  5. 18 5.6
  6. 44 5.7
  7. 80 5.8
  8. 81 5.9
  9. 130 5.10
  10. 62 5.11
  11. 19 5.12
  12. 6 5.13

VB to V12, with no single grade dominating.

  1. 1 VB
  2. 3 V0
  3. 3 V1
  4. 3 V2
  5. 2 V3
  6. 2 V4
  7. 2 V6
  8. 2 V8
  9. 3 V9
  10. 2 V10
  11. 2 V12

Counted from the 478 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 413  Crag only 61 

The order of the climbs along this wall is known from the open catalogue, so a few surveys go a long way: standing at Scout Route, In a Pinch aka Genie, Tonto, Little Bear (4 climbs, about 120 seconds on Scout Rock) would place up to 23 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.

The guidebook for this area

Rock Climbing St. Vrain Canyons - Bernard Gillett every crag it covers

From the publisher

The book has the topos, the descriptions and the local knowledge this page can't. Buying it helps support the people who know the crag best.

Rock, from the geologic map

Silver Plume Quartz Monzonite. about 4,000 to 541 million years old.

Pale yellowish- orange to pale reddish-gray, equigranular, fine- to medium-grained, biotite- muscovite quartz monzonite; some outcrops are gray to tan, medium- to coarse-grained porphyritic quartz monzonite that contains tabular microcline phenocrysts; c

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. The rock named at the top of this page comes from the public geology of this area; this card is the map's answer. Every crag on this unit: Silver Plume Quartz Monzonite. Geology data: Macrostrat (CC BY 4.0), serving USGS and Colorado Geological Survey maps.

On the map since 1902

The USGS has mapped this ground since 1902. 29 historical sheets cover this crag's map point; the oldest is below.

Thumbnail of the 1902 USGS sheet covering South Fork of St. Vrain Canyon
USGS 1:62500-scale Quadrangle for Boulder, CO 1902 · U.S. Geological Survey · 1902 · 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, 1902 to 1984: USGS topoView.

Routes

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
Wall direction not known yet.
Rain & forecast
0 mm of rain in the last 48 hours.
11-11 59°/40° · 0.0 mm · 11 mph · pm storms 0% 11-12 60°/45° · 0.0 mm · 8 mph · pm storms 0% 11-13 60°/42° · 0.0 mm · 8 mph · pm storms 0%
Open-Meteo, fetched 2026-11-11 15:40 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 40.18630 N, 105.33340 W (South Fork of St. Vrain Canyon). That point can be off by hundreds of metres, so say so.

The map point for this crag is on land managed by Roosevelt National Forest (federal). It lies inside national forest.

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 Arapaho and Roosevelt National Forests land

Fees
No entrance fee for the forest. Some locations require a reservation, pass, permit or day-use fee.
Overnight
Camping more than 14 days in a 30-day period, or more than 30 days in a 365-day period, is prohibited across the forests and the Pawnee National Grassland. Dispersed camping is within 300 feet of most Forest Service roads, on National Forest land; the MVUM shows which.

Read on Arapaho and Roosevelt National Forests'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

Mapped parking
270 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.

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