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

Join us October 26th for the Powder Blast fund-raiser to support the Friends of the GNFAC. Ticket sale link in Bio. 
Snowmobiles and weather stations are a couple critical tools used by the GNFAC to provide daily public avalanche advisories. These are made available and maintained through the Friends of GNFAC. The Friends also provide avalanche awareness, outreach and affordable avalanche education throughout southwest Montana.Sled Fest 2018 this Saturday in Cooke City! Raffle tickets to support The Friends of the GNFAC. Still a ton of snow to ride. Photo from one week ago at Lulu pass road-hwy 212 intersection, and photo from 9,500' elev., looking north of Lulu pass.
Event info here: https://www.facebook.com/events/2085996208080373/đź“· @waxeman Wet slab in Centennial Range #gnfacobs A lot of wet slides ran during last week's warm up. Large wet slides are still possible when the snowpack does not freeze for multiple days. 
See our photos page for a look at last week's activity: www.mtavalanche.com/photos 
Spring snowpack info and travel advice on our advisory page: www.mtavalanche.com/advisoryYesterday, riders found the aftermath of a large wet slab in the Lionhead area near West Yellowstone. The slide was hundreds of feet wide and appeared to have failed at or near the ground. Avalanche season isn’t over yet. Stay heads up and practice safe travel protocol when riding in the backcountry. #gnfacobs


Fund-Raiser for the Friends of GNFAC. Support avalanche awareness, education and information throughout southwest Montana. Tickets and info.

May 3-4th, Give Big online fundraising campaign! This is our one-and-only financial appeal to our users.

Sledders, mark your calendar for May 19, the 2nd Annual Sled Fest in Cooke City. It’s a fundraiser for the Friends of the Avalanche Center and there will be a DJ, raffle prizes and BBQ on the mountain.

Alex Marienthal and Doug Chabot provide a few thoughts about why you should read the daily advisory. As the season wears on, don't get "Advisory Fatigue." There is a lot of winter still to come!


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.