Closures
Every closure here is checked against the land manager's own page, dated, and shown with its source. No agency publishes these as one list, so we keep our own.
Last reviewed 2026-09-29 (11 entries checked by a person) — more than 14 days ago; confirm at the source.
Nothing active right now, as far as what we track goes.
Known, not active yet
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Lumpy Ridge raptor nesting closures · Estes Park Valley / Lumpy Ridge · 02-15 – 07-31Covers named rock formations plus the ground around their base and access trails, not the whole ridge uniformly. Which formations are closed changes every season by park press release; the 2026 season opened with The Book, Bookmark, Bookmark Pinnacle, Left Book, Twin Owls, Rock One, Thunder Buttress, The Needle and The Parish, then changed mid-season (formations are added and dropped). Lifted for 2026 as of the source page (checked 2026-08-04). Always confirm the current formation list at the source before relying on it -- this app applies the closure to all of Lumpy Ridge, which is the safe direction to be wrong in, not the precise one.Rocky Mountain National Park · checked 2026-09-29 · source
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Boulder Canyon raptor closure (Eagle Rock, Blob Rock, Bitty Buttress) · Boulder / Boulder Canyon / Eagle Rock, Boulder / Boulder Canyon / Blob Rock Area, Boulder / Boulder Canyon / Bitty Buttress · 02-01 – 07-31From the season-opening Forest Order (#02-10-01-26-01); Forest Order #02-10-01-26-06 (in effect from 2026-04-21, per fs.usda.gov/r02/arp/alerts) superseded it and narrows the list. USFS sometimes narrows the closure mid-season by a superseding order under a new URL (in 2026, Blob Rock and Bitty Buttress reopened April 21 after the eagle pair moved) -- check https://www.fs.usda.gov/r02/arp/alerts for the current order before relying on this in season.USFS Boulder Ranger District, Arapaho-Roosevelt National Forest · checked 2026-09-29 · source
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Boulder Canyon raptor closure (Vampire Rock, Black Widow Slab) · Boulder / Boulder Canyon / Vampire Rock, Boulder / Boulder Canyon / Black Widow Slab · 03-01 – 07-31From the same Forest Order as the Eagle Rock/Blob Rock/Bitty Buttress closure, but a later start date for this area. Check https://www.fs.usda.gov/r02/arp/alerts for the current order in season.USFS Boulder Ranger District, Arapaho-Roosevelt National Forest · checked 2026-09-29 · source
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Clear Creek Canyon raptor closure (near Mile Marker 270) · Golden / Clear Creek Canyon / Bumbling Stock, Golden / Clear Creek Canyon / Stumbling Block, The, Golden / Clear Creek Canyon / Blonde Formation, The, Golden / Clear Creek Canyon / Ghost Crag · 02-01 – 07-31Uphill of US Hwy 6 between mile markers 266 and 270, to protect nesting eagles. The source also names Skinny Legs and the Fault Caves, which aren't separately catalogued crags here -- both sit within this same mile-marker range, so treat any route there as covered even if its crag isn't in the list above.Jefferson County Open Space · checked 2026-09-29 · source
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Clear Creek Canyon raptor closure (near Tunnel 2) · Golden / Clear Creek Canyon / Highlands aka Highlander, The · 02-01 – 07-31Uphill of US Hwy 6 near Tunnel 2. The source also names Evil Area and Tetanus Garden, which aren't separately catalogued crags here -- both sit within this same closure, so treat any route there as covered even if its crag isn't in the list above.Jefferson County Open Space · checked 2026-09-29 · source
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Flatirons North falcon closures (Third Flatiron) · Boulder / Flatirons / North · 02-01 – 07-31OSMP's falcon closures run Feb. 1 to July 31. For 2026 the page names the Third Flatiron here. Which formations close is set each season and some are lifted early; this entry applies to the whole crag, the safe direction to be wrong in.City of Boulder Open Space & Mountain Parks · checked 2026-09-29 · source
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Flatirons Central falcon closures (The Box, Back Porch) · Boulder / Flatirons / Central · 02-01 – 07-31OSMP's falcon closures run Feb. 1 to July 31. For 2026 the page names The Box and Back Porch in this part of the Flatirons. Set each season and sometimes lifted early; applies here to the whole crag.City of Boulder Open Space & Mountain Parks · checked 2026-09-29 · source
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Flatirons South falcon closures (Fern Canyon, The Wings, Shadow Canyon) · Boulder / Flatirons / South · 02-01 – 07-31OSMP's falcon closures run Feb. 1 to July 31. For 2026 the page names Fern Canyon, The Wings and Shadow Canyon; The Sphinx and The Apostle were lifted early on May 15, 2026. Set each season; applies here to the whole crag.City of Boulder Open Space & Mountain Parks · checked 2026-09-29 · source
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Mickey Mouse Wall falcon closure · Boulder / Eldorado Mountain / Mickey Mouse Wall · 02-01 – 07-31Named on OSMP's 2026 falcon closure list, Feb. 1 to July 31.City of Boulder Open Space & Mountain Parks · checked 2026-09-29 · source
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Bat roost closures (The Hand east face, Finger Flatiron standard route, Shark's Fin, Mallory Cave) · Boulder / Flatirons / Central · 04-01 – 10-01Closed April 1 to Oct. 1 every year for roosting bats: the buffer around Mallory Cave, climbing routes on The Hand's east face, the Finger Flatiron standard route and Shark's Fin. The rest of Flatirons Central is open.City of Boulder Open Space & Mountain Parks · checked 2026-09-29 · source
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Der Zerkle east face bat closure · Boulder / Flatirons / Central · 04-01 – 09-01Der Zerkle's east face is closed April 1 to Sept. 1 every year for roosting bats.City of Boulder Open Space & Mountain Parks · checked 2026-09-29 · source
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This list only covers what we've checked by hand; it is not comprehensive. Always confirm with the land manager before climbing in a formation known to have seasonal restrictions.