UDOT PLANNED AVALANCHE CLOSURES!!
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Blog: The Terrain Traps of Butler Fork

Drew Hardesty
Forecaster

Thinking about terrain. There's quite a bit of history in our mountains and quite a bit of avalanche history as well. We're lucky to have a lot of options when we head to the backcountry...which is a good thing - after all, matching our terrain choices to the avalanche conditions may be the Holy Grail for a long life. Of course this isn't a new concept. Well decorated historian of the American West Wallace Stegnerimplored us to have a "society to match the scenery". We can aspire.

A few years ago, I (with the help of Dr. Phoebe McNeally, Mark Hammond and others of the University of Utah) put together a few routes in the Wasatch and rated them on a green to yellow to orange to red scale (similar to the Canadian ATES scale, but that's another story) to convey their interaction with avalanche terrain. You can find it here. Three routes involve Butler Fork of Big Cottonwood Canyon. You can find one of the three here. They're all rated orange, even through they stay mostly on the trail. Why orange? Well...watch the video and see. Photos below from four years ago of an incident 200 yards in from the trailhead that involved some young skiers at the University as described in the video...

Another reason to avoid terrain traps -

Comments
and in the last few years there have been no big slides there...could happen but being south facing...RARE! lower down the west face seems way more suspect and ... potential. still a pretty safe tour ... except when marshall got in that slide there
i go there ALOT!
Tue, 12/31/2013
You've done a great job of pointing out the obvious terrain trap in butler fork. Could you please provide an alternate route through butler to get to the popular west fork glades or further up into butler basin? Or is this supposed to be more of a warning to avoid this altogether during high avy danger days? Thanks UAC for everything you do!
kimble
Tue, 12/31/2013
<p>Kimble - My focus was to point out that Butler Fork holds plenty of avalanche terrain and that you don&#39;t need to be on a steep slope to get into trouble. &nbsp;There are times when we recommend avoiding being on or <em>underneath steep mountain slopes</em>. This is critical &nbsp;when natural avalanches are possible, snowpack structure supports triggering avalanches from below (see the Sheep Creek avalanche tragedy from last spring in Colorado), or others are traveling above you. &nbsp;</p> <p>As noted in the video, follow the trail up the west fork and then cut south into the aspens before the trail heads into the terrain trap. The terrain traps in the east fork is more difficult to avoid. &nbsp;It would be a poor choice under certain circumstances (as found on the avalanche advisory).</p>
Drew
Thu, 1/2/2014