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

Wind loading and huge cornice growth are the two major problems with the snowpack. Cornices can easily break and trigger avalanches. This video is from today in the Bridger Range. Brrr. #gnfacobsCornices are extra large with all the generous snow we've had this season. These monsters and wind loaded slopes are the main avalanche concerns to start the week. On Buck Ridge today, we found 16" of new snow from the weekend's storm. Skies cleared through the morning and wind was calm. We didn't see any avalanches or glaring signs of instability, and the snowpack is generally stable besides new snow and fresh wind slabs. #gnfacobsStrong wind today drifted snow into wind slabs that will continue to grow with more snow and wind this weekend. Avoid wind loaded slopes and any steep slopes where you see signs of instability like cracking and collapsing, or drifting snow. #gnfacobs6-10” of new snow made wind slabs and dry loose avalanches likely today in Hyalite (and throughout the advisory area). We avoided wind loaded terrain and steeper, complex terrain where wind slabs and avalanches in the new snow are likely. #gnfacobs


Dashboard Talks, Episode 5

Eric Knoff and Doug Chabot talk about how steep a slope you need to dig a pit on to get good data. The answer is, "Not that steep."

Doug Chabot and Eric Knoff talk about the questions they ask themselves about avalanches when they are in the backcountry regarding terrain and snowpack.

You should dig snowpits and perform stability tests, but how many is enough? Well that depends... Doug and Eric discuss the relationship between your objectives and pit digging.

King and Queen of the Ridge, Saturday, February 3rd. A Hike and Ski/Ride-a-Thon fundraising event to support the Friends of the Gallatin National Forest Avalanche Center. Sign up and start collecting pledges HERE.


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.