Flatirons South
350 routes and 75 boulder problems · sandstone (Fountain Formation) · 7,408 ft
What's here
5.0 to 5.14, mostly around 5.10.
VB to V10, with no single grade dominating.
Counted from the 409 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) 14 Position on wall known 269 Crag only 142
The order of the climbs along this wall is known from the open catalogue, so a few surveys go a long way: standing at The Keyhole, Trad kr33m, Undertow, Sick For Sleeping (4 climbs, about 120 seconds on Slab, The) would place up to 29 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
Climbing Boulder's Flatirons - Jason Haas - 2nd ed. every crag it covers
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
Fountain Formation. Paleozoic, about 320 to 295 million years old.
Reddish-brown arkosic conglomerate and pebbly sandstone containing thin layers of dark reddish-brown shales. Forms red spines and monuments at Red Rocks and Roxborough Parks and flatirons west and southwest of Boulder. Thickness 512 to 610 m.
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: Fountain Formation. 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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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.
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
Trail and Timberline, volume 2 (1918) · Colorado Mountain Club · 1918
Free to read: public domain or government work. About Boulder 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
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Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
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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
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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
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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
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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
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Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
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Library of Congress, Prints & Photographs Division · Public domain · the record · found by place name, not yet checked
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Library of Congress, Prints & Photographs Division · Public domain · the record · indexed to this place by the archive
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4 more at the Library of Congress.
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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Wikimedia Commons · CC BY · the record · placed by its coordinates
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Wikimedia Commons · CC BY-SA · the record · placed by its coordinates
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Wikimedia Commons · CC BY · the record · placed by its coordinates
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Wikimedia Commons · CC BY · the record · placed by its coordinates
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Wikimedia Commons · CC BY · the record · placed by its coordinates
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Routes
Angel's Wings aka Devil's Wings
- 1 First Angel's Wing West Ridge 5.5
- 2 Second Angel's Wing (aka South Wing Right?) 5.3
- 3 The Middle Wing (4th Wing) 5.3
- 4 North Wing Center 5.3
Apostle, The
- 1 The Tongue is a Rudder 5.7
- 2 The Tongue is like Fire 5.0
- 3 Southeast Ridge 5.2
- 4 East Face Center 5.0
- 5 Northeast Ridge 5.1
Broken Egg
- 1 East Face 5.2
Chimera
- 1 Lost in Lycia 5.0
Damascus
- 1 Christophany 5.6
- 2 Road to Damascus 5.0
Devil's Pinkie (AKA South Pinnacle)
- 1 South Pinnacle Easy 5th
East Ridge
- 1 Kent's Krack 5.12a
- 2 Babyback 5.5
- 3 Unity 5.9
- 4 Galactic Warrior 5.8-
- 5 The Knack 5.8-
- 6 Fountain of Youth 5.10b
- 7 Haywire 5.9+
- 8 Lightning Bolt Arete 5.11b
- 9 Iron Cross 5.11b
- 10 Superguide 5.9
- 11 Ilga Grimpeur 5.11b/c
- 12 Slabmaster aka Stealth Bomber 5.12-
- 13 Edgemaster 5.10d
- 14 Stealth Slab Downclimb 5.4
- 15 Everpresent Lane 5.10
- 16 Fluorescent Gray 5.11c
- 17 Exile 5.12a/b
Fatiron
- 1 Little Murders 5.9
Fern Canyon Bouldering
- 1 Gee Bee V5
- 2 Hee Bee V4
- 3 Shim-ee 'n’ Shake V4-5
Fiddlehead
- 1 Surfing Samarsa 5.8-
- 2 Leprechaun Promenade 5.10b
- 3 Northwest Face 5.2
- 4 Lucky Charms aka Rip This Joint 5.10d
- 5 Irish Spring 5.9+
- 6 Unknown Dihedral 5.9
- 7 Chains of Love 5.12b
- 8 Stemadilemma 5.11d
- 9 A Shadow Sickness 5.10a
- 10 Castles Made of Sand 5.12a
- 11 Fertile Crescent. 5.11+
- 12 Men Only 5.10
- 13 East Face/Fiddle Head 5.4
Forgotten Flatiron aka Icarus
- 1 East Face Left 5.5
- 2 Central East Face Easy 5th
Goose, The
- 1 Love's Labor Lost 5.10a/b
- 2 Deserted Cities of the Heart 5.9
- 3 Arete 5.8
- 4 Big Bruce 5.12b
- 5 Raging Bull (aka Cub) 5.11b
- 6 Sweet and Innocent 5.10
- 7 Wild Horses 5.12+
- 8 Skein 5.12c
- 9 Golden Goat 5.11-
- 10 Batman 5.10b
- 11 Duck, Duck, Goose 5.7
- 12 South Face 5.3
- 13 South Arete 5.7
- 14 Loosey Goosey 5.9
- 15 Mother Goose 5.7
- 16 East Face / Goose 5.3
Harmon Flatironette
- 1 East Face South Side 4th
- 2 East Face North Side 4th
Harmon's East
- 1 East The Face 4th
Jamcrack Spire
- 1 Southeast Chimney 5.5
- 2 East Face Right 5.5
- 3 North Wide Crack 5.8
- 4 Left Crack 5.9
- 5 Right One 5.10
- 6 Big Dog 5.11
- 7 Holeistic 5.10c
- 8 Fear Of Flying 5.10
Lost And Found
- 1 Lost In Space aka East Face Left 5.5
Love and Marriage Boulder, The
- 1 Downclimb V-easy
Madein Boulder
- 1 East Face Left Easy 5th
Maiden, The
- 1 Gates of Galas 5.10d
- 2 The Gates of Delirium 5.11c
- 3 Kor-Dalke Route 5.12a
- 4 Hasta La Hueco 5.13b
- 5 South Face 5.8
- 6 Eye Of the Storm 5.9+
- 7 Belladonna 5.11b
- 8 The Southern Seas 5.11b
- 9 Heart of the Sunrise 5.11a
- 10 South Crack 5.11b
- 11 East Ridge 5.10c
- 12 Dream Street Rose 5.11b/c
- 13 Cunning Stunt 5.10d
- 14 Direct North Face 5.9
- 15 North Face 5.6
- 16 West Overhang 5.11b/c
- 17 Maiden Voyage 5.12b
Major Maroon Boulder
- 1 Major Maroon Traverse V2
Mars Block
- 1 Cream Puff 5.12d
- 2 The School 5.12+
- 3 Plain or Peanut 5.11a
Matron, The
- 1 South Face 5.6
- 2 Direct Start to South Face 5.9+
- 3 Warlocks 5.12a
- 4 The Human Experiment 5.13a
- 5 East Ridge 5.5
- 6 Quiche on a Leash 5.10c
- 7 Real Men Don't Eat Quiche 5.11-
- 8 Pasta Man 5.9
- 9 North Crack 5.10c
- 10 North Face 5.6
- 11 North Face Right 5.7
- 12 Serpentine Dreams 5.12b
- 13 Father Knows Best 5.11b
- 14 West Face 5.8
- 15 Sunday Comix 5.9+
Medusa
- 1 Turn to Stone 5.7
- 2 The Gorgon 5.8
Nebel Horn Ridge
- 1 Nebel End 5.7+
- 2 Nebel Via 5.0
- 3 Scarecrow 5.7
- 4 Over The Rainbow 5.10b
- 5 One In The Chamber 5.8
- 6 Rainbow Bridge 5.9
- 7 Queen’s Highway 5.9+
- 8 Jennifer's Crack 5.8+
- 9 Ruby Slipper 5.11c
- 10 Grand Theft Auto 5.9
- 11 Earache My Eye 5.10+
- 12 Violator 5.13b/c
- 13 Shot 5.10c
- 14 "Space Invaders" to "Shot" 5.10c
- 15 False Gods, Real Men 5.10
- 16 Rads For Rookies 5.8
- 17 Death Block Chimney 5.7+
Northern Egg
- 1 East Face 5.3
Onoclea
- 1 West Face, Onoclea 5.7
- 2 East Face/Onoclea 5.3
Overhang Rock
- 1 Rogue's Arete 5.10a
- 2 Thulsa Doom 5.13a
- 3 Snake Watching 5.13a
- 4 Ouroboros 5.12d
- 5 Honey Badger 5.13a
- 6 Tits Out For The Lads 5.12b
- 7 Release the Hostages 5.13-
- 8 The Big Picture 5.12b
- 9 Missing Link 5.12b/c
- 10 Short Attention Span 5.11d
- 11 Strata-Caster 5.12c
- 12 Junior Achievement 5.8
- 13 West Side (Story) 5.6
- 14 North Ridge, South Spire 5.5
- 15 South Ridge of South Pinnacle 5.7
- 16 East Face 5.6
Pegasus
- 1 Take the Bit 5.8
- 2 Ride On 5.10a
- 3 Spread Your Wings 5.10a
- 4 Saddle Up 5.7
- 5 Son of a Sea Dog 5.6
- 6 Asleep in the Parthenon 5.7
- 7 The Golden Bridle 5.8
Pellaea
- 1 East Face/Pellea 5.5
Pup, The
- 1 East Face 4th
- 2 An Arm and a Leg 5.9+
Pyramid
- 1 Original Route 5.4
- 2 South Ridge 5.3
Rudder, The
- 1 East Face 3rd
Saqqara
- 1 Banana Split 5.10
Seal Rock
- 1 Misbehaven 5.9+
- 2 Super Tuscan 5.13b
- 3 I Am The Walrus 5.14a/b
- 4 No Philter 5.13d
- 5 Choose Life 5.13c
- 6 Thunder Muscle 5.14a
- 7 Supercell 5.13c/d
- 8 Choose Muscle 5.13c/d
- 9 Primate 5.13b
- 10 The Gruffalo 5.11a
- 11 The Flute 5.12b
- 12 Jade Gate 5.11+
- 13 Southwest Face 5.4
- 14 East Face South Side 5.4
- 15 East Face North Side/Seal Rock 5.4
- 16 Shortcut (East Face) 5.4
- 17 The Stoop 5.12b
- 18 The Hinge 5.13a
- 19 The Yellow Door 5.13b
- 20 Sea of Joy 5.13a
- 21 Sea Bird 5.12
- 22 Archaeopteryx 5.11d
- 23 Storm Bird 5.12a
- 24 The Perfect Storm 5.13a
- 25 Love Wins 5.13a
- 26 Pit of Despair (pitch 1) 5.10+
- 27 Nattiq 5.12
Shanahan Crag
- 1 Leonine 5.10d
- 2 DK Superstar 5.12c
- 3 Shoulder Season 5.12d
- 4 Great Expectations 5.9-
- 5 Prune Face 5.7
- 6 Better Offer 5.9+
- 7 Beau! 5.7+
- 8 Identity Theft 5.7+
- 9 In Broad Daylight 5.6
- 10 Thieves In the Temple 5.7
- 11 One Bubb Missed 5.8
- 12 South Face 5.5
- 13 Vague Jug Line 5.7+
- 14 When It's Right 5.8
- 15 Southeast Ridge 5.0
- 16 Southeast Ridge, North Crag 5.5
- 17 Direct Southeast Ridge, North Crag 5.9-
- 18 East Face - Northern Shanahan Slab 5.2
- 19 Bear Peak, The Hard Way 5.8
Slab, The
- 1 The Keyhole 5.8
- 2 Syzygy 5.2
- 3 Left 'N Up 5.2
- 4 Up and Right 5.3
- 5 Bulges 5.2
- 6 Low Traverse 5.2
- 7 Diagonal 5.2
- 8 The Return of Dow 5.9-
- 9 Northeast Arete 5.5
- 10 Just Another Boy's Climb 5.12a
- 11 Nasty Boys 5.12
- 12 Film Noir 5.12c
- 13 Shalohsh 5.12-
- 14 Family Man 5.12a/b
- 15 Boys with Power Toys 5.12b
- 16 Steep Face 5.13a/b
- 17 k00kEEz and krEEm 5.12+
- 18 Whipping Post 5.12a
- 19 Trad kr33m 5.10a
- 20 Sump Pump 5.11c
- 21 Prime the Pump (Pitch 1) 5.11c
- 22 Prime the Pump 5.12c
- 23 Pen 14 5.13a/b
- 24 Anaconda 5.13c
- 25 Kr33m in the $33m 5.12
- 26 Pumpy Overhang 5.13a
- 27 Whipped Cream 5.13a
- 28 The Hunger 5.13b
- 29 Niblits V7
- 30 m1n1-kr33m V5
- 31 Undertow 5.12b
- 32 Sweet NiBLitz 5.12d
- 33 Hippopotamus 5.11a
- 34 Sick For Sleeping 5.11b/c
Southern Goose Egg
- 1 Rude Welcome 5.11+
- 2 South Ramp 5.2
- 3 Eggstreme 5.4
- 4 Power Bacon 5.10a
- 5 Fruity Pebbles 5.9
- 6 Eggsciting 5.6
- 7 The Sea and Mirror 5.10c
- 8 East Face/S Goose Egg 5.2
Sphinx, The
- 1 Upper East Face, Sphinx 4th
- 2 Half Man, Half Beast 5.12a
- 3 The BFE Dihedral 5.8
- 4 Curse of the Pharaoh 5.7
- 5 Pharaoh's Tomb 5.10
- 6 A Sphinxter Says What? 5.11a
- 7 Lower East Face, Sphinx 5.7
- 8 Face the Sphynx 5.6
- 9 Sphynx Not 5.6
- 10 I Sphynx There's a Way 5.6
- 11 The Tiller Easy 5th
Superfresh Boulder
- 1 Fresh Prince Traverse V1-
- 2 Superfresh Dihedral 5.10c
- 3 Superfresh 5.12d
Third Advisor
- 1 Some Advice Is Hard to Follow 5.9
- 2 Everybody Has An Opinion 5.8
- 3 Good Advice 5.3
- 4 Good Advice You Just Didn't Take 5.8+
- 5 Free Advice 5.6
- 6 Surprisingly Good Advice 5.7
- 7 Unsolicited Advice 5.8
- 8 Sage Advice 5.9
- 9 Supposed Former Grade Inflation Junkie 5.10
Toddler Rock
- 1 Born Again 5.8
Tower Of The Moon
- 1 Eaves Dropper 5.10b
- 2 Southeast Ridge 4th
Unknown Rock
- 1 Chosspile Chimney 5.3
X Crack Boulder
- 1 X Crack V2-
Zoofarsus
- 1 Zooloo V3
- 2 Zoofarsus Roof V4
Elsewhere at this crag
- East Face/Fatiron 5.5
- Left Side 5.8
- Toponas 5.8
- Fatironette 4th
- Purple Serpent 5.13b
- Northeast Ridge 5.0
- Pink Hyena aka Tuck n' Cover 5.13a
- East Face Complete 5.7
- East Face of the Eastern Crag (South) Easy 5th
- East Face/Tiny Tower 5.6
- Alan Nelson's Bulging Belly 5.10
- West Ridge 5.2
- Mentor 5.12b
- A Quickie 5.11a
- Cheating Reality 5.14a
- Damn Daniel 5.2
- East Face 5.4
- East Face 5.4
- Northeast Ridge 5.6
- Northwest Arete 5.8
- Snickers Dihedral 5.5
- South Arete 5.3
- South Crack Right 5.6
- The Inside Passage 5.12c
- AC-DC 5.9
- Almond Joy 5.8+
- Cerebrus 5.9
- Chockstone Roof 5.7
- Climbing Non-Sunse 5.8
- Confinement Corner 5.8
- Crankin' stein 5.9-
- D1 5.10a
- Dark Territory 5.11b
- Death By Pickies 5.9
- Direct North Face 5.10
- Dragons Of Eden 5.5
- East Face 3rd
- East Face - North Rib of the Eastern Crag 4th
- East Face Right 5.4
- Fear No Evil 5.8
- Fine Line 5.9+
- Gates Of Hell 5.10b
- Home Run 5.10b
- I Want My Mummy 5.10-
- Insane 5.8
- Knots-feratu 5.4
- Less Talk, More Sauce 5.9
- Lichen-thrope 5.8
- Mounds 5.3
- Off Width Her Head! 5.8+
- Put Me In Iso 5.6
- Quackie 5.6
- Quirkie 5.7
- Right Between The Horns 5.5
- Satan's Toy 5.11a
- Seemed Like a Crack 5.8
- Shady Character 5.8+
- Solar Flare 5.6
- South Ramp of Lost and Found 4th
- Sunset Arete (Variation of Wind Song Dihedral) 5.8
- The Devil's Plaything 5.10c
- Thirteen Words for Choss. 5.9
- Three Musketeers 5.7
- Three's a Crowd 5.10a
- Under Seige 5.11d
- Under Siege 5.12-
- Weak Sauce 5.10
- White Stallion 5.10a
- White Stallion, The 5.10a
- Wind Beneath the Devil's Wings 5.10a
- Wind Song Dihedral aka Original Route 5.5
- Wings Of Steel 5.10a
- A Bit Like Coffee V3
- A-void V2
- All About Bob V2
- Ambidextrous V8
- Birth and Transmogrification 5.12a
- Black Ice V10
- Bliss V4
- Bob's Crack V1+
- Bongo (Fury) V6
- Bro-mancer V7
- Changs of Love V3
- De-void V2
- Dinktown USA V2
- Dr. Funkenstein V2
- Dude's Face V3-4
- Eara Fuchin' Schmuckin' V3
- Early Departure V0-1
- Easy Skeazin V0
- Fernicious V6-
- Fire Prancer V5-6
- For Her Pleasure V4
- Frondling V5
- Funk Soul Roof V3+
- Funk Soul Roof (Stand Start) V1
- GFP V1
- Had it Rough V3
- Holly's Face (variation) V7-
- It Satisfies V5
- It Satisfies Left V6
- Kleine Schlampe V3
- Left Interference V1
- Madam Assey V0
- Mamoonia V3
- Mamoonious Flake V3
- Necromancer V6
- Parasol V5
- Paw Prints V0
- Plush V6
- Pumped Full of Purpose V9
- Rap line 5.10a
- Reese's Pieces 5.3
- Right Interference V1
- SW Corner V1
- Saskatchewanderer V6
- Schnitzel Bock V2
- Shag V3
- Slap the Cabbage V7
- Slip V4
- Slip Slip V6
- Slip Slip Slipity V7
- Slip, Slip, Slipity Slide V7+
- Slipstream V2
- Snuff V1
- Southeast Arete V7
- Spewbacca V4
- Squeezin' and Skeezin' V4
- Stretch Your Index V4
- Sun Dancer V8
- Tall Boy V3-
- The Antithesis of Bob V0
- The Final Void V2
- The Spire V9
- The Spire Right V7
- Thread the Needle V6
- Toes Before Hoes V4
- Tower of Power V10
- What About Bob? V5
Also within 3 km
- Flatirons Central1,201 m · 204 routes and 66 boulder problems · 6,347 ft
- Sobo1,225 m · 10 routes · 8,527 ft · Eldorado Canyon State Park
- Diamond Head1,691 m · 14 routes · 7,896 ft · Eldorado Canyon State Park
- The Sacred Cliffs2,525 m · 27 routes and 7 boulder problems · 8,094 ft
- Split Block2,682 m · 5 routes · 7,475 ft · Eldorado Canyon State Park
- Cadillac Crag2,777 m · 29 routes · 7,177 ft · Eldorado Canyon State Park
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 City of Boulder Open Space and Mountain Parks (local government), in Us Patent - Bear Peak.
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 City of Boulder Open Space and Mountain Parks land
- Fees
- Parking fees apply at certain trailheads for vehicles not registered in Boulder County.
- Permits
- Off-trail permits are required to reach some climbing areas inside Habitat Conservation Areas.
- Climbing permit
- It is illegal to place fixed protection without a permit. Replacement and new bolted routes go through the Flatirons Climbing Council application, decided by OSMP.
- Rules
- Climbing gear -- ropes, webbing, slings, quickdraws -- may not be left unattended. Grooming, tree cutting, rock gluing and chipping are prohibited. Drones are prohibited. Seasonal raptor closures run 15 December to 31 July depending on species.
- Overnight
- Camping is prohibited on Open Space and Mountain Parks, as are tents, nets and other structures. The exception is Buckingham Campground at Fourth of July Trailhead.
- Dogs
- All dogs must be leashed unless the dog and its guardian are registered in the Voice & Sight Tag Program, and off-leash dogs must display the city's V&S tag and rabies tags.
Read on City of Boulder Open Space and Mountain Parks'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.
Nearby, from OpenStreetMap
- Campsite
- Camp Patiya, 4,257 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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