Miles' Cliff
4 boulder problems · Boulder Creek Granodiorite · 7,454 ft
How well located
Position on wall known 4
No route here has its own point yet. The map pin is the crag. At the wall? Survey it: 30 seconds per route.
The order of the climbs along this wall is known from the open catalogue, so a few surveys go a long way: standing at Circle of Fifths, Giant Steps (2 climbs, about 60 seconds) would place up to 2 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.
Rock, from the geologic map
Boulder Creek Granodiorite. Paleoproterozoic, about 2,500 to 1,600 million years old.
Mottled black and white medium- to coarse-grained, foliated granodiorite, locally porphyritic and may include some quartz monzonite. Age about 1.72 billion years (Hedge and others, 1967, p. 555).
This is the map unit under this crag's map point, read from the 1:100,000 sheet (Trimble and others, 2003, U.S. Geological Survey Geologic Investigations Series I-856-H). 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: Boulder Creek Granodiorite. Geology data: Macrostrat (CC BY 4.0), serving USGS and Colorado Geological Survey maps.
On the map since 1899
The USGS has mapped this ground since 1899. 31 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, 1899 to 1983: USGS topoView.
Photographs near this crag
Taken within 1.5 km of this crag's map point and published under a licence that lets us show them, from Wikimedia Commons. The coordinates say where the camera was, not what it was pointed at, so some of these will be the creek or the trail rather than the rock.
Wikimedia Commons · CC BY · the record · placed by its coordinates
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Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.
Wikimedia Commons · CC BY-SA · the record · placed by its coordinates
Report this item
Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.
Routes
Also within 3 km
- Roof Party Boulder25 m · 2 boulder problems · 7,467 ft · Roof Party Boulder
- Cat Lawyer Boulder31 m · 4 boulder problems · 7,503 ft · Cat Lawyer Boulder
- Boomer Block196 m · 1 boulder problem · 7,283 ft · Boomer Block
- Green Slab Block227 m · 1 boulder problem · 7,250 ft · Green Slab Block
- Natural Apparatus Boulder253 m · 1 route and 7 boulder problems · 7,221 ft · Natural Apparatus Boulder
- Nestled Unknown262 m · 1 boulder problem · 7,224 ft · Nestled Unknown
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 Boulder County Parks & Open Space (local government), in Walker Ranch.
The boundary is close. Land managed by Denver Water Board comes within 250 m of this point, and the point is not the rock — the wall itself may be on the other side of the line. Check which before you rely on either one's rules.
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 Boulder County Parks & Open Space'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
- Toilets
- 812 m away (map)
- Mapped parking
- 354 m away, 3 spaces (map)
- Campsite
- Camp Patiya, 2,282 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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