Mushroom Ridge
1 boulder problem · Granitic rocks of 1700-m.y. age group · 9,614 ft
How well located
Crag only 1
No route here has its own point yet. The map pin is the crag. At the wall? Survey it: 30 seconds per route.
Rock, from the geologic map
Granitic rocks of 1700-m.y. age group (Boulder Creek Granite, Cross Creek Granite, Denny Creek Granodiorite, Kroenke Granodiorite, Browns Pass Quartz Monzonite, Powderhorn Granite, Pitts Meadow Granodiorite, Bakers Bridge Granite, Tenmile Granite) — granite, minor granodiorite, quartz monzonite. Paleoproterozoic, about 2,500 to 1,600 million years old.
Includes Boulder Creek -M.Y. AGE GROUP (AGE 1650-1730 M.Y.)--Includes Boulder Creek, Cross Creek, Denny Creek, Kroenke, Browns Pass, Powderhorn, Pitts Meadow, Bakers Bridge, and Tenmile Granites, Quartz Monzonites, or Granodiorites; also, unnamed granitic rocks
This is the map unit under this crag's map point, read from the 1:500,000 sheet (Horton and others, 2017, U.S. Geological Survey Data Series 1052). 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 500 m wide on the ground, so the wall itself may be the neighbouring unit. Every crag on this unit: Granitic rocks of 1700-m.y. age group. Geology data: Macrostrat (CC BY 4.0), serving USGS and Colorado Geological Survey maps.
On the map since 1954
The USGS has mapped this ground since 1954. 18 historical sheets cover this crag's map point; the oldest is below.
USGS Historical Topographic Map Collection · Public domain · the record · placed by its coordinates
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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, 1954 to 2000: USGS topoView.
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.
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.
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.
Routes
Also within 3 km
- Bob Tower693 m · 2 routes · 9,370 ft · Muddy Creek
- Muddy Creek Boulder710 m · 3 boulder problems · 9,326 ft · Muddy Creek
- Creekside716 m · 3 routes · 9,246 ft · Muddy Creek
- Crag 2717 m · 2 routes · 9,267 ft · Muddy Creek
- Crag 1734 m · 3 routes · 9,281 ft · Muddy Creek
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.
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.
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
The map point for this crag is on land managed by Arapaho 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
- Campsite
- Wild camping spot, 3,075 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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