Photos

Large cornice collapse in Middle Basin. The cornice broke 10' back from the edge, 6-7' deep, and ran 800-1000' vertical. The collapse was triggered by a dog in another party. Photo: GNFAC

We visited the avalanche that was triggered by a snowmobiler and partially buried 2 people on January 4th. The crown was 10 feet at the deepest part. Photo: GNFAC

We visited the avalanche that was triggered by a snowmobiler and partially buried 2 people on January 4th. The crown was 10 feet at the deepest part. Photo: GNFAC

We visited the avalanche that was triggered by a snowmobiler and partially buried 2 people on January 4th. The crown was 10 feet at the deepest part. Photo: GNFAC

Photo: Carter Olson

Snowmobile buried in debris of a slide that was triggered by a rider and caught two others who were on their sleds below. See link below for more details. Photo: Carter Olson

Photo: Quinn

"We did notice a few recent natural avalanches on wind loaded north aspects in aprons below large cliffs and underneath large cornices (D0.5 - D1, max depth 1m, max width 30m) but these seemed to mostly be small soft storm slabs. - One recent crown near the top of the Mummy (30cm deep) looked to have run naturally on an old crust layer (photo)" - Photo: Zachary Miller

"Beauty of a day up in Hyalite so long as you didn't mind the wind. The SW/W winds were cranking and clearly transporting snow all day at ridgetop...We did notice a few recent natural avalanches on wind loaded north aspects in aprons below large cliffs and underneath large cornices (D0.5 - D1, max depth 1m, max width 30m) but these seemed to mostly be small soft storm slabs." -  Photo: Zachary Miller

Triggered during control work on 1/4/2020. Photo: BSSP

Triggered during control work on 1/4/2020. Photo: BSSP

Snowmobilers triggered this slide in the 3rd Yellow Mule off Buck Ridge on Saturday (1/4/20).

 @carter.olson

From one of the riders that was caught, "The 3 persons involved were traveling across the slope about 20-30 yards up from the tree line parallel to the ridge line in the slide area when it broke, not high marking and not traveling uphill. One rider did increase his elevation while traveling across the slope but was never more than 1/4 of the way up when the slide was triggered."

This slide was triggered by Bridger Bowl ski patrol during control work on Saturday (1/4/2020). It shows deeply buried persistent weak layers from early October and November were pushed to a breaking point by the recent snow and wind. A person can trigger avalanches like this on heavily wind loaded slopes in the backcountry. Additionally, shallower large avalanches can be triggered on any steep slope. Photo: J. Olson

This slide was triggered by Bridger Bowl ski patrol during control work on Saturday (1/4/2020). It shows deeply buried persistent weak layers from early October and November were pushed to a breaking point by the recent snow and wind. A person can trigger avalanches like this on heavily wind loaded slopes in the backcountry. Additionally, shallower large avalanches can be triggered on any steep slope. Photo: BBSP

This slide was triggered by Bridger Bowl ski patrol during control work on Saturday (1/4/2020). It shows deeply buried persistent weak layers from early October and November were pushed to a breaking point by the recent snow and wind. A person can trigger avalanches like this on heavily wind loaded slopes in the backcountry. Additionally, shallower large avalanches can be triggered on any steep slope. Photo: BBSP

A natural avalanche crown was seen on Yellow Mountain near Big Sky on Saturday morning (1/4/20). Photo: A. Schauer

Skiers saw this debris and crown in 'Avalanche Bowl' near Fairy Lake on Friday (1/3/20). Photo: S. Mooney