Authority Wall
3 routes · Granitic rock of Mount Princeton batholith, equigranular biotite-hornblende monzogranite interior facies · 9,691 ft
How well located
Position on wall known 3
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 rock of Mount Princeton batholith, equigranular biotite-hornblende monzogranite interior facies. Eocene, about 38 to 34 million years old.
Light-gray, medium- to coarse-grained, equigranular monzogranite. Average of six modal analyses indicates about 24 percent quartz, 28 percent potassium feldspar, 37 percent plagioclase, 10 percent biotite plus hornblende, and accessory large sphene (easily visible in hand specimen), magnetite, allanite, apatite, and zircon (Shannon, 1988). Predominant phase of the Mount Princeton batholith, forms the major unit along South Cottonwood Creek and Chalk Creek
This is the map unit under this crag's map point, read from the 1:100,000 sheet (Kellogg and others, 2017, U.S. Geological Survey Scientific Investigations Map 3382). 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: Granitic rock of Mount Princeton batholith, equigranular biotite-hornblende monzogranite interior facies. Geology data: Macrostrat (CC BY 4.0), serving USGS and Colorado Geological Survey maps.
On the map since 1955
The USGS has mapped this ground since 1955. 16 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, 1955 to 1994: 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
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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
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Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.
Library of Congress, Prints & Photographs Division · Public domain · the record · found by place name, not yet checked
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Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.
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.
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.
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.
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.
Routes
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 San Isabel 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 Pike-San Isabel National Forests land
- Fees
- No entrance fee for the Pike-San Isabel National Forests or the Cimarron and Comanche National Grasslands. Fees apply at campgrounds and day-use areas operated by the forest's concessionaire, paid on site.
- Overnight
- On the Leadville, Salida and San Carlos districts of the San Isabel, camping at any location within the same 20-mile radius for more than 14 days in a continuous 30-day period is prohibited. No camping within 100 feet of water outside a developed or designated site.
Read on Pike-San Isabel 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
- Toilets
- 763 m away (map)
- Mapped parking
- 90 m away (map)
- Campsite
- Cottonwood Lake Campground, 730 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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