We Must Respect Land Closures

Eagle nest in Boulder CanyonClosure Update – June 23, 2015

The raptor closure updates for the season have come in, the raptors have chosen their nests. See below for the latest details and background on the closures.

2014 closures on Boulder OSMP land helped to produce six peregrine falcons, nine prairie falcons and three golden eagles.


  • Boulder Falls Trail will be closed 6/17 through 7/15 while we work to officially reopen it (full details at bottom of this page)
  • Longs Peak and all access trails will be closed on Tuesday June 16th (full details at bottom of this page)
  • Der Zerkle is closed April 1 through September 1 for bat roosting (full details here)
  • East face of The Hand, standard route on Finger Flatiron, and all of Shark’s Fin are closed April 1 through October 1 for bat roosting (full details here)
  • Boulder Falls, which includes access to the Plotinus Wall and the Wall of Winter Warmth, remains closed until flood damage is repaired.


All Boulder Canyon climbing areas EXCEPT Eagle Rock are now OPEN!

The Sphinx, Bear Creek Spire, and Skunk Canyon including the Sacred Cliffs are now OPEN!

Climbing areas on City of Boulder OSMP land that are closed until July 31 (full details here):

  • Lefthand Canyon Palisades, at the intersection of Lefthand Canyon Drive and Olde Stage Road (Buckingham Picnic area remains open)
  • Mount Sanitas Summit, south of the Mt. Sanitas East Ridge Trail, east of Mt. Sanitas Trail (both trails remain open)
  • Flagstaff Mountain, the north side of Flagstaff Mountain will be closed (the Boy Scout Trail will remain open)
  • Third Flatiron, including the Queen Anne’s Head, W.C Fields Pinnacle, 1911 Gully and the Ghetto, the East Bench & West Bench, the East & West Ironing Boards, The Fin, Green Thumb and Jaws
  • The Back Porch and The Box
  • Fern Canyon, north of the Fern Canyon Trail, including the Nebel Horn Ridge, East Ridge, the Goose and the Goose Eggs (the designated Fern Canyon hiking trail will remain open)
  • Shadow Canyon and the Matron (the Maiden will remain open and accessible from the east; Shadow Canyon Trail will remain open)
  • The entire Mickey Mouse wall, including South Tower, North Tower, Central Tower, Ship’s Prow, Wall of Shiva’s Dance, The Gargoyle, the East Face and Cryptic Crag

Climbing areas on US Forest Service land that are closed until July 31 (full details here):

  • Eagle Rock

Climbing areas in Eldorado Canyon State Park that are closed until July 15 (full details here):

  • Millennium Crag
  • Rattlesnake Gulch Trail upper loop

Climbing areas in Clear Creek Canyon on Jefferson County land that are closed until July 31 (full details here):

  • Stumbling Block
  • Bumbling Stock
  • Skinny Legs/Blonde Formation

Climbing areas in Lumpy Ridge on National Park Service land that are closed until July 31 (full details here):

  • Twin Owls
  • Rock One
  • Batman Rock
  • Batman Pinnacle
  • Checkerboard Rock
  • Alligator Rock
  • Lightning Rock
  • Thunder Buttress
  • The Parish
  • Sundance Buttress
  • Sheep Rock


Each year from February 1 to July 31 some climbing crags are closed to protect nesting raptors. We will post the most current closure information for Eldorado Canyon, the Flatirons, and Boulder Canyon as it becomes available.

The closures help protect long-established raptor nesting territory, including vital alternate nest sites. Undisturbed access to multiple nest sites is important for birds of prey, especially early in the nesting season, to give them a chance to visit multiple nests during courtship and to select a site for the season, free of human influence.

“As part of a small team of volunteer climber-biologists, we install trail cameras on the cliffs before the nesting season and make observations to determine when and where the eagles choose to nest. Once nesting is confirmed by observations of incubation behavior and/or an egg, the USFS opens the other areas. Ongoing observations are used to keep track of the number of eagles fledged and sources of mortality. Once fledging is confirmed, the nest cliff is opened again to climbing. This is a collaborative effort built on trust and shared interest between the climbing community, biologists, and USFS, so please get the word out. (Knuckleheads who violate the closures to climb anyway, selfishly violate that trust, put the eagles at risk of nest failure, and face a hefty fine.)

Climbers played essential roles in the research and recovery of peregrine falcons and Sierra bighorn sheep, and brought the California condor back from the brink of extinction. It is our time to do our part again, and respect the closures when they are in effect, as golden eagles face an uncertain future because of threats from wind turbines, lead contamination, electrocutions, and habitat loss.”

Rob Roy Ramey II, Ph.D.


The BCC is proud to announce that we have entered a cooperative effort with the City Of Boulder’s OSMP to work on hiking access to Lower Dream Canyon. As a first step of that long term initiative to officially open up logical climbing access. The Front Range Climbing Stewards, our professional trail-building team, will be working on sections of the Boulder Falls Trail access from June 17th through July 15th (Tuesday – Friday 7am to 5pm). No one will be allowed to pass through the worksite branching off of the Boulder Falls Trail for safety reasons during work days. This will be a multi-stage project. If you are interested in volunteering to assist us with this project, we would love to have your help along the various stages of work! Presently our efforts are concentrated on solidifying one access above the falls through the keyhole. Details and register here: http://www.eventbrite.com/e/boulder-falls-climbers-trail-work-volunteer-opportunities-tickets-17315782973

Wild Basin Area near Ozuel Falls – trail will be closed during the time the helicopter is near the falls unloading equipment and supplies. Closure points: Bluebird Junc- unimproved trail to Calpyso Cascades-unimproved trail junction. The unimproved trail will be open to hikers. After Ozuel Falls move to Lightning Bridge near treeline on Longs Peak Trail. Closure points: Battle Mountain Junction to Goblins Forest. After Lightning Bridge move to North Long’s Peak Trail near North Longs Bridge. Closure points: North Long’s/ Glacier Gorge Junction to North Long’s / Boulder Brook Junction to Alberta Falls. Last is Confunction Junction (connector trail between Finch & Calpyso Cascades). Closure points: at Junction at Finch Lake down to the Calpyso Cascade – unimproved trail junction.

Stewardship... Community... Activism...

Thanks to these awesome businesses that support the BCC's efforts:

rei The Spot Boulder Rock Club Colorado Mountain School Movement Boulder Earth Treks Golden