Gilligan's Island
2 routes and 45 boulder problems · granite (Silver Plume-type quartz monzonite) · 7,701 ft
What's here
VB to V8, mostly around V1.
Counted from the 45 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 4 Crag only 43
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 Barnacle, Poop Deck (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
Silver Plume Quartz Monzonite. Mesoproterozoic, about 1,600 to 1,000 million years old.
Coarse-grained to fairly fine-grained muscovite-biotite quartz monzonite. Locally foliated. Age about 1.44 billion years (Hedge, 1969).
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. 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: Silver Plume Quartz Monzonite. 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. 24 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 1994: 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-SA · 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
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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
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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
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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.
Wikimedia Commons · CC BY-SA · 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.
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.
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.
Wikimedia Commons · CC BY-SA · 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.
Wikimedia Commons · CC BY-SA · the record · placed by its coordinates
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Hidden as soon as you tell us, everywhere it appears, before anyone reviews it.
10 more on Commons.
Routes
- 1 Barnacle V1
- 2 Fearless Man V3-4
- 3 Keelhauling 5.7
- 4 Poop Deck 5.10+
- 20 ft. Wave V1-2
- A Flogging V3+
- Beach Hut V1
- Beginner's Luck V0
- Breaker V0-1
- Cast-Out V3
- Castaway V4
- Coconut V2
- Dead Wood V0+
- Dinghy V2-3
- Ginger V8
- Island Greeting V1
- Island Hut V3
- Kipper V4-
- Lagoon V4
- Low Tide V1-2
- Marry Ann V1
- Matt Damon Is Inside Of Marry Ann V1
- Mrs. Howell V1
- No One's Gonna Buy You a Big Wheel V2+
- Rescue V5
- Row Boat V0-1
- Sandy V6-7
- Seven On The Beach V2-3
- Ship's Prow V4
- Six-Hour-Ride V3
- Skin Boat V2-3
- Skipper V5
- Smoke Signals V1
- Stor Ofta V-easy
- Sun Baked V2
- The Captain V5
- The Crest V1
- The Mast V2+
- The Professor V5
- Three Hour Tour V8
- Thurston Howell V3+
- Tide Pool V0
- Tropical Sea V3
- Tropicana V3+
- Unknown route V1
- Vanished V0
- Your Orders V6
Also within 3 km
- Pirate's Cove106 m · 13 boulder problems · 7,718 ft
- Tortuga170 m · 34 boulder problems · 7,677 ft
- Huhly Muhly Boulders386 m · 12 boulder problems · 7,580 ft
- High Pond680 m · 10 boulder problems · 7,822 ft
- Ponderosa Trail (SOUTH)764 m · 17 boulder problems · 7,643 ft
- Peabody Boulders766 m · 6 boulder problems · 7,753 ft
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 Jefferson County Open Space (local government), in Alderfer/Three Sisters Park. It lies inside local park.
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 Jefferson County Parks & Open Space land
- Climbing permit
- Installing fixed hardware on a new route requires a permit: a Fixed Hardware Application, vetted by the Fixed Hardware Review Committee before the Climbing Committee decides.
- Hours
- Unlawful to be on Open Space land from one hour after sunset to one hour before sunrise, unless posted otherwise.
- Rules
- JCPOS does not install, maintain or inspect hardware related to rock climbing. Climbing ethics differ by park -- Clear Creek Canyon, the Cathedral Spires and the South Platte each have their own published guidelines.
- Overnight
- Camping by advance permit only, obtained online at least 24 hours ahead -- not at the park, headquarters or by phone. Only White Ranch and Reynolds Parks, tent-only.
- Dogs
- Dogs must be on a leash ten feet or less in length and under physical control.
Read on Jefferson County Parks & Open Space'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.
Approach trail, from Jefferson County
Homestead Trail in Alderfer/Three Sisters Park passes 35 m from this crag's map point. The county rates it least difficult. Pets: yes.
A segment the county flags as climber access, drawn on the Take me there map. Where it leaves the trail for the base of the wall is the guidebook's to say, not ours.
Nearby, from OpenStreetMap
- Toilets
- 347 m away (map)
- Mapped parking
- 373 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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