Putnam Basin Boulders
10 boulder problems · arkose (Cutler Fm, with siltstone, conglomerate) · 11,479 ft
What's here
V1 to V6, mostly around V3.
Counted from the 10 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 8
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
Cutler Fm (Cutler Formation) — arkose, siltstone, conglomerate, minor clastic. Permian, about 299 to 269 million years old.
Arkosic sandstone, siltstone, and conglomerate
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: Cutler Fm. Geology data: Macrostrat (CC BY 4.0), serving USGS and Colorado Geological Survey maps.
On the map since 1897
The USGS has mapped this ground since 1897. 30 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, 1897 to 1982: 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
Geological and geographical atlas of Colorado and portions of adjacent territory · F. V. Hayden, U.S. Geological and Geographical Survey of the Territories · 1877
Free to read: public domain or government work. About Durango 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.
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.
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.
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
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 Juan National Forest (federal). It lies inside inventoried roadless area, 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.
Nobody has yet read San Juan National Forest's own rules for this crag and written them down here, so treat the above as where you are, not as what you may do.
Nearby, from OpenStreetMap
- Campsite
- Little Molas Lake Campground, 4,209 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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