The Forgotten Mile-Wide Avalanche That Struck Northern Utah in 1986 | 1 Million Cubic Yards of Snow, 60 Feet of Debris

Martin Kuprianowicz | | AvalancheAvalanche
On February 20, 1986, the Wood Camp Hollow avalanche broke over 5,000′ wide and traveled 2.5 miles before coming to a halt. | Photo courtesy UAC

My landlord’s name is Pete. He’s in his sixties and has been skiing here in the Wasatch since he was my age or younger (I am 23). He’s seen his fair share of skiing and avalanches.

I was riding up with Pete to Alta Ski Area this afternoon when I learned about the Wood Camp Hollow avalanche that happened in February of 1986. 

The thing gives me chills. 

Pete said that at that time he was going backcountry skiing in the area with some buddies when he saw the biggest avalanche debris field any of them had ever seen in their lives. It was miles long, and several stories deep.

The crown traversed ridgeline after ridgeline for thousands of feet.

This is one of the largest avalanches I’ve ever heard of, let alone in Utah, my home—so I dug a little deeper. 

In the archives of the Utah Avalanche Center, I found a detailed report of the avalanche that struck that day and it only intensified the chill I felt from Pete’s story. How is an avalanche of this proportion even possible—so close to where I live and ski in the backcountry virtually every day of the winter? I needed to know…

Here’s what the Utah Avalanche Center has recorded in their archives about the Wood Camp Hollow avalanche in February of 1986

Avalanche: Huge Natural Avalanche, Wood Camp Hollow, 2-20-1986

Observer Name:
Observation Date:
Tuesday, March 13, 2012
Avalanche Date:
Thursday, February 20, 1986
Logan » Logan River » Huge Natural Avalanche, Wood Camp Hollow, 2-20-1986
Location Name or Route:
Wood Camp Hollow, 2-20-1986
Avalanche Type:
Wet Slab
Weak Layer:
Depth Hoar

We recently found some historic photos of a huge avalanche in Wood Camp Hollow. The avalanche occurred on February 20, 1986…

Thanks to Kevin Kobe for letting us copy a few of his great slides…… And Mike Van Horn for the rough black and whites and documentation of the event…

Photos courtesy of the UAC


The event was written up in “The Snowy Torrents,” a classic chronicle of US Avalanche Accidents between 1980 and 1986, by Logan and Atkins. (86-13)

Logan Canyon Utah, 1 Very Large Avalanche

Weather Conditions: Strong winds and wet, heavy snows and frequent rains continued to blast the Wasatch Mountains of northern Utah. Since February 11, Wasatch ski areas reported over 40 inches of snow and more than 5.0 inches of water equivalent. A thick blanket of heavy snow covered a weak snowpack along the steep mountains of Logan Canyon.

Avalanche Data: Sometime on February 20, a massive avalanche released from the steep eastern face of the ridge between Beirdneau Peak and Mt. Elmer. Over one million cubic yards of snow raced down the narrow drainage of Wood Camp Hollow—about 13 miles east of Logan—tearing out trees and boulders. The avalanche was classified as an SS-N-5: it released from about 8,600 feet and fell 3,100 vertical feet as it raced 2.5 miles down the drainage. At its widest spot in the starting zone, the slide was over 1 mile across. In the valley, runout zone debris was piled over 60 feet deep.

Comments: Though this was not an avalanche accident it is certainly a noteworthy avalanche event. The avalanche debris in the summer of 1986 looked much like a glacier. The last of the debris did not melt away until the summer of 1987.

Large and long-running avalanches are not unfamiliar to the Beirdneau Peak area of Logan Canyon. In January 1971, several drainages to the southwest of Wood Camp Hollow, two large avalanches ran more than one mile, both damaged and destroyed several houses and structures. Though no structures were damaged in the February 20 event, these long-running avalanches should serve as a reminder to developers and builders. Permanent structures built in avalanche paths eventually get struck…


Photos courtesy of the UAC

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6 thoughts on “The Forgotten Mile-Wide Avalanche That Struck Northern Utah in 1986 | 1 Million Cubic Yards of Snow, 60 Feet of Debris

  1. I observed the deposition/debris field 3 days after it happened. I took pictures of my skiing partner, Thor Dyson, standing on/in the deposition zone/ debris field (I need to find them). Simply amazing site. The avalanche flowed 60-70 feet up each side of the canyon, taking out huge swaths of large trees on the north faces and many, many cedars on the south facing slopes. As word spread in Cache Valley, many came to see what had happened (there are probably more pictures out there). It was about 1/2 mile walk from the pullout on Hwy 89, so it was fairly accessible. It should be noted that this Pacific storm cycle was not only going on in Northern Utah, it was hitting the Tetons as well – Ski Patroller Tom Raymer was caught, buried, and killed while perform avalanche hazard reduction efforts at Jackson Hole Mountain Resort on 02/17/86. As stated above, it was a great summertime attraction to go up and see the amount of snow left.

    1. Hey Sal, the destructive potential of that slide was just mind-boggling. I can’t imagine what it was like seeing it in person. Sad news about the patroller back then. Thanks for sharing this detailed response, we really appreciate you!

  2. Hanging around with Fote? That boy has stories. Pete sent me the article. Brought back memories. Spent a little time in Logan. Have a few adventures in and around Logan Canyon.
    For what its worth, Wood Camp had at one time been a prospective location for what would eventually become Sun Valley, which also by no small coincidence has a few good personal stories revolving around the Sun Valley Downhill, the Poobah (Ask Pete about the Poobah), ……wild times in the Valley of the Dolls.
    Anyhoo, Wood Camp was rejected because it was too difficult to access, but it was considered by the Austrian skiers and some 10th Mountain Division guys involved in the survey as an area with amazing potential. This same core group of dudes that scouted Wood Camp would go on to establish the major ski areas in Colorado.
    Although not directly involved in the Sun Valley selection, a Swiss guy named Ernst Bloke , who was passed over for the 10th for political reasons, but considered one of the very best skiers of that group, went on to found Taos Ski Valley. The Taos story, if your one for history, is simply amazing, and one of the many great stories in the history of ski area development.
    NIce work on the Wood Camp story. Next time you see Pete ask him about the Juggie Hotel and give him a wet willy.

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