Welcome to the Gallatin National Forest Avalanche Center (GNFAC) web site. This site is brought to you by the Friends of the GNFAC, a non-profit supporting avalanche awareness and education through a partnership with the GNFAC.

Based in Bozeman, Montana, the GNFAC covers an area of approximately 6,000 mi2, including the Bridger, Gallatin, and Madison Ranges, the Lionhead area near West Yellowstone, and the mountains around Cooke City.

Danger Scale

GNFAC Instagram

Mount Blackmore: Today, a skier wrote the following email with the picture. The red line marks the crown. Wind-loading was the likely trigger. "From the ridge between the east and north face on Mount Blackmore we observed a crown line on the north ridge of Blackmore. The crown line was approximately 150' long and 1'-2' deep. We skied the SE terrain on the skiers left side of the east face of Blackmore, so we didn't get close to the crown line to inspect the snow. There were no tracks visible near the avalanche so it was likely naturally triggered by wind-loading blowing over the ridge from the west." Photo: T. Chingas #gnfacobsRiding around Cooke City on all aspects we found a weak layer of near-surface facets buried under the new snow. This layer may persist for a while and with additional weight (new snow or wind-loading) it could avalanche in the coming weeks. #gnfacobs6-12” of low density new snow today near Bozeman and Big Sky. Storm slabs and dry loose avalanches are possible for a couple days. #gnfacobsWe had a great turnout for the snowmobile avalanche awareness class in West Yellowstone. Great to see so much interest in avalanche education!


Carve, December 2017
By Doug Chabot

The Friends of the Avalanche Center present Episode 4, the final one in the Get Avalanche Smart series, promoting avalanche education.

Dick Aspen hilariously stars in Get Avalanche Smart - Episode 2: Don't be like Dick. This is the second of four episodes promoting avalanche education by the Friends of the Avalanche Center.

The best $30 you’ll ever spend, guaranteed: Our Intro to Avalanches with Field Day. Two evenings of lectures plus a full day in the field digging pits and learning about rescue.


Weather Stations

Weather Stations provide the GNFAC forecasters with information on snowfall, wind and temps from around the region. The Weather Log summarizes this daily.

Avalanche Education

GNFAC partners with groups around the region to provide evening avalanche classes, plus full day and multi-day courses, including some weekend field days. All our class offerings, along with courses from other providers, are on our Education Calendar.


Use this map to find the locations of unfamiliar places mentioned in the advisory. Also take a look at our glossary of avalanche terms.


Donate to the Friends of GNFAC; or order DVDs or 'Snow Sense' avalanche safety handbook.