Greyrock

67 routes and 6 boulder problems · granite and gneiss · 7,170 ft

Take me there Routes ↓ Directions

Help locate these routes: survey the wall

What's here

5.5 to 5.12, with no single grade dominating.

2 5.5
9 5.6
13 5.7
13 5.8
6 5.9
13 5.10
7 5.11
3 5.12

V5 to V10, with no single grade dominating.

1 V5
2 V6
1 V7
1 V9
1 V10

Counted from the 72 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) 3 Position on wall known 64 Crag only 6

The order of the climbs along this wall is known from the open catalogue, so a few surveys go a long way: standing at Trojan Romance, Two Minds Meet, Beer for Breakfast (3 climbs, about 90 seconds on South Slabs, The) 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.

The guidebook for this area

Colorado Bouldering: Front Range - Phillip Benningfield, Matt Samet - 2020 every crag it covers

From the publisher Bookshop.org

Bookshop.org links are affiliate links: if you buy through one we earn a commission, at no extra cost to you. Bookshop.org gives its profits to independent bookshops.

Poudre Canyon Rock Climbing Guide - Bennett Scott - 3rd ed. every crag it covers

From the publisher Bookshop.org

Bookshop.org links are affiliate links: if you buy through one we earn a commission, at no extra cost to you. Bookshop.org gives its profits to independent bookshops.

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

Biotite granite — syenogranite, monzogranite, granite. Mesoproterozoic, about 1,600 to 1,000 million years old.

Gray to buff, fine- to medium-grained, equigranular to seriate porphyritic biotite syenogranite to monzogranite, correlated with granite of Log Cabin batholith and other Silver Plume-type granites throughout the Front Range (Eggler and Braddock, 1988; Shaver and others, 1988); associated with smaller unnamed intrusive bodies and dikes. Color index generally 2 to 5. To the north of the Log Cabin batholith, unit forms an oval, irregular plug intruded into the Sherman Granite phases of the Virginia Dale ring-dike complex; intrusion age established as 1,390±30 Ma (Rb-Sr isochron; recalculated from Peterman and others, 1968). To the south and east of the Log Cabin batholith, unit includes numerous irregular shaped intrusive bodies and dikes along the 1.2 Ga (Abbott, 1972) Skin Gulch shear zone which might be displaced or satellitic bodies of the main Log Cabin batholith or may be separate plugs and dikes intruded between the Log Cabin and Longs Peak-St. Vrain batholiths. Unit is primarily porphyritic to south where equigranular phase (Yge) is mapped separately; includes mafic quartz monzonite of Abbott (1976)

This is the map unit under this crag's map point, read from the 1:100,000 sheet (Workman and others, 2018, U.S. Geological Survey Scientific Investigations Map 3399). 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: Biotite granite. Geology data: Macrostrat (CC BY 4.0), serving USGS and Colorado Geological Survey maps.

On the map since 1907

The USGS has mapped this ground since 1907. 17 historical sheets cover this crag's map point; the oldest is below.

Thumbnail of the 1907 USGS sheet covering Greyrock — **USGS 1:125000-scale Quadrangle for Livermore, CO 1907** · U.S. Geological Survey · 1907 · 1:125,000 sheet
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, 1907 to 1980: USGS topoView.

In print since 1877

1877 Geologic Map of Colorado (Hayden), high-resolution scan · F. V. Hayden; scan by the Colorado Geological Survey · 1877

The whole-state sheet of the 1877 atlas, scanned at full resolution by the state survey and free to download.

Colorado Geological Survey (publication HM-01-04) · Public domain · read it
Geological and geographical atlas of Colorado and portions of adjacent territory · F. V. Hayden, U.S. Geological and Geographical Survey of the Territories · 1877

The first geology anyone drew of this ground. Hayden's survey mapped the state in the 1870s; these are the sheets, with the rock units coloured as they understood them then.

Internet Archive (Brigham Young University copy) · Public domain · read it

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 · Keystone View Company · 1908 · stereograph
Library of Congress, Prints & Photographs Division · Public domain · the record · found by place name, not yet checked

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