The Bihedral Area Rock Climbing
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Elevation: | 6,850 ft |
GPS: |
40.0034, -105.3969 Google Map · Climbing Area Map |
Page Views: | 248,758 total · 1,167/month |
Shared By: | Kreighton Bieger on Sep 13, 2006 |
Admins: | Leo Paik, John McNamee, Frances Fierst, Monty, Monomaniac, Tyler KC |
Access Issue: Seasonal Closures 2024 - Bitty Buttress, Eagle Rock, Blob, Security Risk
Details
2/1/24: W. McCurry: to protect nesting golden eagles, U.S. FS annual area closures in Boulder Canyon beginning 2/1/24 - Blob, Bitty Buttress, Eagle Rock, Security Risk.
USFS lifted closures 7/26/23.
From W. McCurry: 2/10/23 Blob, Bitty Buttress, & Security Risk opened. Eagle Rock stayed closed - info: fs.usda.gov/detail/arp/news….
W. McCurry, NFS, Arap./Roo. NF: USFS began annual area closures in BC 2/1/23. The closures were Eagle Rock, Blob Rock, Bitty Buttress & Security Risk.
Through 7/31/23, the closures protect a long-established golden eagle nesting territory. Happy Hour, Bihedral & Riviera will remain open as long as visitors stay out of the closed areas.
The Boulder Ranger District with BCC monitors nesting progress & informs climbers about the importance of giving the eagles space to raise young.
Fed. & state laws prohibit disturbing any nesting bird of prey. Visitors help protect wildlife by respecting all closures. Signs are posted at key access pts into the closed areas. Closure info: fs.usda.gov/goto/arp/eagles.
K. Armstrong, Public Affairs Specialist, Nat'l Forest Service: as of 6/8/21: BC areas reopen after unsuccessful nesting.
K. Armstrong, NF Ranger 7/29/20:
Following a 5 mo. closure to protect nesting eagles, the Roosevelt NF has reopened Eagle Rock.
“The BC eagles successfully raised 1 strong and healthy eaglet this year,” said wildlife biologist Aurelia DeNasha, USDA FS. “2 chicks hatched initially, unfortunately only 1 survived to fledge, which isn’t uncommon in birds of prey.”
Visits to the nest did not reveal the exact cause of death of the 2nd chick, but cooperation by climbers with closures are crucial to the eagles’ success.
“Golden eagle pairs are most susceptible to disturbance when choosing a nest. These closures allow the birds to pick the best site for survival without impact of other factors, such as human presence. Once chosen, the nest site stays closed until the eagles fledge in late July,” said DeNasha.
After the eagles’ site selection was made, unused areas opened in Apr.
The annual nesting closures include popular rock climbing spots at Eagle Rock, Blob Rock, Bitty Buttress & Security Risk.
Effective through 7/31/20, the closures protect a long-established golden eagle nesting territory. Happy Hour, Bihedral & Riviera remain open as long as visitors stay out of the closed areas.
The Boulder Ranger District partners with BCC & AF to monitor nesting progress and to inform climbers about the importance of giving the eagles space to raise their young.
It is against federal & state law to disturb any nesting bird of prey. Only employees, volunteers, & wildlife professionals under an agreement with the FS enter nesting areas for monitoring purposes. This is for the integrity of nest & the safety of the eagles, those conducting surveys, & the public. Visitors help protect wildlife by respecting all closures & leaving immediately if you should accidentally enter one.
For the most current closure information, check signs in the areas, call the Boulder Ranger District office @ 303-541-2500, or visit local climbing websites or fs.usda.gov/recmain/arp/rec….
As of 4/21/20, Blob Rock, East Blob Rock, Bitty Buttress, & Security Risk are open. Eagle Rock stays closed until 7/31/2020 confirmed with Matt Henry, Rec Prog Mgr, FS.
From K. Armstrong, FS Pub Aff, katherine.armstrong@usda.gov, 970-222-7607: 3/20/19, Blob Rock, East Blob Rock, Bitty Buttress, & Security Risk are open. Eagle Rock stays closed to climbing & other activities through 7/31/19.
The Boulder Ranger District partners with BCC & AF to monitor nesting progress & to inform climbers.
See - fs.usda.gov/recmain/arp/rec….
Perennial notice:
Eagle Rock, Blob Rock, Bitty Buttress, & Security Risk will close 2/1 - 7/31 for nesting. Depending on updated information, the closure time can be shortened/lengthened.
Each year, BC raptor nesting area closures are in effect starting 2/1 through 7/31 at Eagle Rock, Security Risk, Blob Rock, & Bitty Buttress. The area is monitored & closures are periodically lifted early (due to no active nest, nest site failure, or early fledging). This monitoring program is a partnership with the FS Boulder Ranger District, BCC, & Audubon Society. Check back periodically during times of closure for updates. More info at fs.usda.gov/recarea/arp/rec…
USFS lifted closures 7/26/23.
From W. McCurry: 2/10/23 Blob, Bitty Buttress, & Security Risk opened. Eagle Rock stayed closed - info: fs.usda.gov/detail/arp/news….
W. McCurry, NFS, Arap./Roo. NF: USFS began annual area closures in BC 2/1/23. The closures were Eagle Rock, Blob Rock, Bitty Buttress & Security Risk.
Through 7/31/23, the closures protect a long-established golden eagle nesting territory. Happy Hour, Bihedral & Riviera will remain open as long as visitors stay out of the closed areas.
The Boulder Ranger District with BCC monitors nesting progress & informs climbers about the importance of giving the eagles space to raise young.
Fed. & state laws prohibit disturbing any nesting bird of prey. Visitors help protect wildlife by respecting all closures. Signs are posted at key access pts into the closed areas. Closure info: fs.usda.gov/goto/arp/eagles.
K. Armstrong, Public Affairs Specialist, Nat'l Forest Service: as of 6/8/21: BC areas reopen after unsuccessful nesting.
K. Armstrong, NF Ranger 7/29/20:
Following a 5 mo. closure to protect nesting eagles, the Roosevelt NF has reopened Eagle Rock.
“The BC eagles successfully raised 1 strong and healthy eaglet this year,” said wildlife biologist Aurelia DeNasha, USDA FS. “2 chicks hatched initially, unfortunately only 1 survived to fledge, which isn’t uncommon in birds of prey.”
Visits to the nest did not reveal the exact cause of death of the 2nd chick, but cooperation by climbers with closures are crucial to the eagles’ success.
“Golden eagle pairs are most susceptible to disturbance when choosing a nest. These closures allow the birds to pick the best site for survival without impact of other factors, such as human presence. Once chosen, the nest site stays closed until the eagles fledge in late July,” said DeNasha.
After the eagles’ site selection was made, unused areas opened in Apr.
The annual nesting closures include popular rock climbing spots at Eagle Rock, Blob Rock, Bitty Buttress & Security Risk.
Effective through 7/31/20, the closures protect a long-established golden eagle nesting territory. Happy Hour, Bihedral & Riviera remain open as long as visitors stay out of the closed areas.
The Boulder Ranger District partners with BCC & AF to monitor nesting progress and to inform climbers about the importance of giving the eagles space to raise their young.
It is against federal & state law to disturb any nesting bird of prey. Only employees, volunteers, & wildlife professionals under an agreement with the FS enter nesting areas for monitoring purposes. This is for the integrity of nest & the safety of the eagles, those conducting surveys, & the public. Visitors help protect wildlife by respecting all closures & leaving immediately if you should accidentally enter one.
For the most current closure information, check signs in the areas, call the Boulder Ranger District office @ 303-541-2500, or visit local climbing websites or fs.usda.gov/recmain/arp/rec….
As of 4/21/20, Blob Rock, East Blob Rock, Bitty Buttress, & Security Risk are open. Eagle Rock stays closed until 7/31/2020 confirmed with Matt Henry, Rec Prog Mgr, FS.
From K. Armstrong, FS Pub Aff, katherine.armstrong@usda.gov, 970-222-7607: 3/20/19, Blob Rock, East Blob Rock, Bitty Buttress, & Security Risk are open. Eagle Rock stays closed to climbing & other activities through 7/31/19.
The Boulder Ranger District partners with BCC & AF to monitor nesting progress & to inform climbers.
See - fs.usda.gov/recmain/arp/rec….
Perennial notice:
Eagle Rock, Blob Rock, Bitty Buttress, & Security Risk will close 2/1 - 7/31 for nesting. Depending on updated information, the closure time can be shortened/lengthened.
Each year, BC raptor nesting area closures are in effect starting 2/1 through 7/31 at Eagle Rock, Security Risk, Blob Rock, & Bitty Buttress. The area is monitored & closures are periodically lifted early (due to no active nest, nest site failure, or early fledging). This monitoring program is a partnership with the FS Boulder Ranger District, BCC, & Audubon Society. Check back periodically during times of closure for updates. More info at fs.usda.gov/recarea/arp/rec…
Description
The Bihedral Area includes at least 4 sub-areas: The Bihedral, The Riviera, the Left Side and The Lower Tier. For organizational purposes, this is subdivided here. This Approach to The Riviera and The Bihedral. may help.
The Bihedral Area rock is typical Boulder Canyon granite climbing. Generally less than vertical on bullet hard grey granite. Good friction with a high concentration of slopers, both large and small, and positive incut edges. The Bihedral crag itself is identified by a huge, left-facing dihedral and sits on the north side of the canyon. The dihedral is split by a prow about 1/2 way up. The Riviera is located down & right of The Bihedral. The Left Side is located to the left of The Bihedral. The Lower Tier is located below the The Bihedral (Upper Tier) upper tier.
The Bihedral Area rock is typical Boulder Canyon granite climbing. Generally less than vertical on bullet hard grey granite. Good friction with a high concentration of slopers, both large and small, and positive incut edges. The Bihedral crag itself is identified by a huge, left-facing dihedral and sits on the north side of the canyon. The dihedral is split by a prow about 1/2 way up. The Riviera is located down & right of The Bihedral. The Left Side is located to the left of The Bihedral. The Lower Tier is located below the The Bihedral (Upper Tier) upper tier.
Getting There
Drive 7 miles up the canyon (zero at the bridge a la Rossiter), park just past the Riviera at a pullout on the right, or there is shady parking on the left side identified by a west-facing "No Camping" sign nailed to a tree. The huge, left-facing dihedral of the Bihedral is obvious above you. Cross the road, walk down a bit and pick a line up a boulder field and scoot left around a short broken buttress. 4th class it up past some trees on your right and gain a nice ledge at the bottom of the big dihedral. There are a few good routes here, but the most well known is the 2 pitch Bihedral Arete, which Rossiter so obtusely refers to as "something of a classic".
Classic Climbing Routes at The Bihedral Area
Mountain Project's determination of the classic, most popular, highest rated climbing routes in this area.
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