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Universal Gravitation

This route is located in the Muir Valley at Sunbeam Buttress

Radical Evolution

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Backstabber 5.9 (Sport) ***

First Ascent: J.J., Karla Carandang, Jared Hancock in 2005
Length: 40ft
Bolts: 4 (report bad bolts/anchors)

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This fun arete with a brief overhanging move or two is sure to be enjoyed by many. Cool moves on good holds. Be careful when cleaning to avoid getting stabbed in the back by a large pine tree.
Descent: Cable Anchor above roof
Stays Dry:
Owner: Muir Valley

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Quality Consensus

2.88 stars (75 votes)
Grade Consensus
5.9+ (79 votes)

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Submitted by: Lil Josh
Date: Mar 19th, 2009

Submitted by: J-Rock
Date: Feb 15th, 2006


pawilkes said on August 2nd, 2005
I think this is the most fun 5.9 sport line in the red. it is short but has some really unique moves. total 5 star.
corduroy said on August 30th, 2005
i agree - enjoyable the whole way
michaelarmand said on June 15th, 2007
It was short and not very sustained, but the crux definitely seemed harder than 5.9....
dbarless said on June 15th, 2007
The business was before the second bolt, and was totally harder than 5.9. Whoever graded these climbs really sandbagged...
bcombs said on November 12th, 2007
I thought I was on an 11 when climbing this, I miscounted the routes. So, the whole time I'm thinking "This 11 feels like a 5.9". Definitely nothing harder then 5.9 on here though.
Lander said on March 26th, 2008
5.9 one move wonder. s'okay.
Jollygreen68 said on October 20th, 2008
Weird route, and NOT a 5.9. It felt more like a mid 5.10. Not very many good holds, very slabby, felt kind of sketched out most of the time. Wasn't very fun for me. But others may love it. Very dirty and not worth climbing the ledge for.
sgauss said on October 21st, 2008
Took a little work to find this. There was one hold I could feel flex under my hand, beware.
randomboulder said on May 26th, 2009
fun route, but I was a bit wary of yarding too hard on the big flake/jug. I don't want to be around if that thing ever comes off.
anticlmber said on May 9th, 2010
Spikeddem said on March 11th, 2012
The crux move--in J-Rock's photo--seemed a bit hard for 5.9. Totally a one-move wonder. Worst route on the wall probably...but it's still OK. 5.9+
lena_chita said on November 25th, 2012
It is one of those routes that I climb and think, if 5.9 were my limit, no way would I be able to do this, not even close.
Scorl said on May 20th, 2013
The large pine tree mentioned in the description is no longer an issue.
rjackson said on November 19th, 2020
Perhaps the closest to the grade of anything here.