Continue with onX Maps
Sign in with Facebook
Dihedral Variation
5.10a YDS 6a French 18 Ewbanks VI+ UIAA 18 ZA E1 5a British
Avg: 2.2 from 27
votes
Routes in The Bihedral (Upper Tier)
|
A Fly in the Ointment T,S 5.10b 6a+ 19 VII- 19 E2 5b |
|
|
Acid Crack T 5.10b 6a+ 19 VII- 19 E2 5b |
|
|
Acid Rock T 5.8+ 5b 16 VI- 15 HVS 4c PG13 |
|
|
AHR S 5.11c/d 7a 24 VIII 25 E4 6a |
|
|
Backdoor Slider S 5.9- 5c 17 VI 16 HVS 4c |
|
|
Bihedral T 5.8+ 5b 16 VI- 15 HVS 4c PG13 |
|
|
Bihedral (Upper Tier) | 9914, The T 5.11+ 7a 24 VIII 24 E4 6a |
|
|
Bihedral Arete T,S 5.10a 6a 18 VI+ 18 E1 5a |
|
|
Blood Diamond S 5.11c 6c+ 24 VIII- 24 E4 6a |
|
|
Crack Variation T 5.9 5c 17 VI 17 HVS 5a R |
|
|
Dan's Line S 5.8 5b 16 VI- 15 HVS 4c |
|
|
Daydreaming T 5.10a 6a 18 VI+ 18 E1 5a |
|
|
Diamonds and Rust S 5.8+ 5b 16 VI- 15 HVS 4c |
|
|
Dihedral Variation T,S 5.10a 6a 18 VI+ 18 E1 5a |
|
|
Edge of Reality S 5.12b 7b 26 VIII+ 26 E5 6b R |
|
|
Fat Tuesday T,S 5.10+ 6b+ 21 VII+ 20 E3 5b |
|
|
Flags of Our Fathers T,S 5.10a 6a 18 VI+ 18 E1 5a |
|
|
Flesh Eating Flies S 5.11a 6c 22 VII+ 22 E3 5c |
|
|
Group Therapy S 5.8 5b 16 VI- 15 HVS 4c |
|
|
Hesitantly Decisive T 5.9- 5c 17 VI 16 HVS 4c PG13 |
|
|
Heterohedral T 5.9 5c 17 VI 17 HVS 5a PG13 |
|
|
High Hard One S 5.9+ 5c 17 VI 17 E1 5a |
|
|
Hold The Line S 5.9 5c 17 VI 17 HVS 5a |
|
|
It's Time For Change T,S 5.8 5b 16 VI- 15 HVS 4c |
|
|
Just Putin Around T 5.9 5c 17 VI 17 HVS 5a PG13 |
|
|
Left-Handed Tool T 5.8 5b 16 VI- 15 HVS 4c |
|
|
Night Moves T,S 5.7 5a 15 V+ 13 MVS 4b |
|
|
Oh Boy T,S 5.10c 6b 20 VII 20 E2 5b |
|
|
Pariah S 5.12b 7b 26 VIII+ 26 E5 6b |
|
|
Puff Daddy S 5.10a 6a 18 VI+ 18 E1 5a |
|
|
Rhodian Shores S 5.10b 6a+ 19 VII- 19 E2 5b |
|
|
Rhodian, Naturally T,TR 5.9- 5c 17 VI 16 HVS 4c R |
|
|
Sands of Iwo Jima S 5.11d 7a 24 VIII 25 E5 6a |
|
|
Sun Spot T 5.7 5a 15 V+ 13 MVS 4b |
|
|
Thumb Tack T 5.11d 7a 24 VIII 25 E5 6a |
|
|
Tool King T,S 5.8 5b 16 VI- 15 HVS 4c |
|
|
Trick or Treat T,S 5.8 5b 16 VI- 15 HVS 4c |
|
|
Where's Ray? S 5.8 5b 16 VI- 15 HVS 4c |
Order Wrong?
Sort Routes
| Type: | Trad, Sport, 100 ft (30 m) |
| GPS: | 40.0035, -105.3964 |
| FA: | Jim Erickson and Chris Reveley, 1979. |
| Page Views: | 2,540 total · 10/month |
| Shared By: | Tony B on Jun 1, 2005 |
| Admins: | Leo Paik, John McNamee, Frances Fierst, Monty, Monomaniac, Tyler KC |
Your To-Do List:
Add To-Do ·
Your Star Rating:
Use onX Backcountry to explore the terrain in 3D, view recent satellite imagery, and more.
Now available in onX Backcountry Mobile apps! For more information see this post.
Access Issue: Seasonal Closures 2025 - Bitty Buttress, Blob, Security Risk reopened. Eagle Rock opened 5/19/25.
Details
On 5/19/25 Eagle Rock opened. On 3/14/25: Bitty Buttress, Blob, & SR reopened.
2/3/25. Bitty Buttress, Blob, Eagle Rock &, Security Risk closed for raptor nesting.
FS (3/27/24): Eagle Rock & Security Risk are now open!
2/1/24: W. McCurry: USFS annual area closures in Boulder Canyon beginning 2/1/24 - Blob Rock, Bitty Buttress, Eagle Rock, Security Risk.
From W. McCurry: 2/10/23 Blob, Bitty Buttress, & Security Risk opened. Eagle Rock is 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, Blob, Bitty Buttress, & Security.
Through 7/31/23, the closures protect 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 giving eagles space to raise young.
Fed. & state laws prohibit disturbing any nesting bird of prey. Visitors help protect wildlife by respecting 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 & healthy eaglet this year,” wildlife biologist Aurelia DeNasha, USDA FS. “2 chicks hatched initially, 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 climber cooperation with closures are crucial to the eagles.
“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, nest sites 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, Blob, Bitty Buttress, & Security.
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, East Blob, Bitty Buttress, & Security are open. Eagle 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, Blob, Bitty Buttress, & Security 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, Security, Blob, & 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…
2/3/25. Bitty Buttress, Blob, Eagle Rock &, Security Risk closed for raptor nesting.
FS (3/27/24): Eagle Rock & Security Risk are now open!
2/1/24: W. McCurry: USFS annual area closures in Boulder Canyon beginning 2/1/24 - Blob Rock, Bitty Buttress, Eagle Rock, Security Risk.
From W. McCurry: 2/10/23 Blob, Bitty Buttress, & Security Risk opened. Eagle Rock is 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, Blob, Bitty Buttress, & Security.
Through 7/31/23, the closures protect 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 giving eagles space to raise young.
Fed. & state laws prohibit disturbing any nesting bird of prey. Visitors help protect wildlife by respecting 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 & healthy eaglet this year,” wildlife biologist Aurelia DeNasha, USDA FS. “2 chicks hatched initially, 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 climber cooperation with closures are crucial to the eagles.
“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, nest sites 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, Blob, Bitty Buttress, & Security.
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, East Blob, Bitty Buttress, & Security are open. Eagle 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, Blob, Bitty Buttress, & Security 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, Security, Blob, & 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
Dihedral Variation is a great alternate start to Bihedral Arete.
Try it the next time you go up to do Bihedral Arete -- you won't be disappointed.
EDIT: The following text was added by someone other than me, and is not my opinon: ("The protection is good -- two bolts were added with permission from the FA Jim Erickson in February 2009. The dead bush at the crux was removed, dirt cleaned from the crack, and lichen brushed off the walls of the dihedral. It's a fun, physical climb that deserves to see more traffic on lead.")
This is the shallow dihedral between Bihedral Route and Bihedral Arete. Climb up the right face using holds on the arete, then work back left to the corner.
EDIT: The following text was added by someone other than me, and is not my opinon: ("Two bolts protect the crux, with good gear placements before and after. Exit right at the top of the dihedral, and continue up p1 of Bihedral Arete.")
You can rap 100' from a 2-bolt anchor at the top of p1 of Bihedral Arete with a 60m rope, or continue up p2 of Bihedral Arete (10a), or up the last pitch of Flags of Our Fathers (9), and descend via two rappels.
2 Comments