Little Boulder

1 route and 5 boulder problems · Morrison, Canyon Springs Member Of Sundance And Jelm Formations · 5,914 ft

Help locate these routes: survey the wall

What's here

V0 to V3, with no single grade dominating.

2 V0
2 V1
1 V3

Counted from the 5 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

Position on wall known 2 Crag only 4

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

Morrison, Canyon Springs Member Of Sundance And Jelm Formations (Morrison Formation, Canyon Springs Member, Jelm Formation). Mesozoic, about 222 to 150 million years old.

Morrison Formation (Upper Jurassic)?Upper part of unit is brown sandy marly shale underlain by red and gray shale with beds of silty limestone. Lower part is fine- to medium-grained sandstone 3-4.5 m thick underlain by dark greenish-gray impure limesto

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: Morrison, Canyon Springs Member Of Sundance And Jelm Formations. 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. 26 historical sheets cover this crag's map point; the oldest is below.

Thumbnail of the 1906 USGS sheet covering Little Boulder — **USGS 1:62500-scale Quadrangle for Loveland, CO 1906** · U.S. Geological Survey · 1906 · 1:62,500 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, 1906 to 1984: 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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