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.


Friday, 27 October, 6:30 p.m. at the Emerson Cultural Center. Tickets and Info

Join the GNFAC, MSU, guest speakers, educators, and vendors for the evening.

Info and schedule.

Spring Sled Fest in Cooke City

A fundraiser for the Friends of the Avalanche Center. $20 raffle tickets for sweet prizes; free BBQ on the mountain; raffle and party at Soda Butte Lodge 8 p.m.

Hidden Gully Avalanche

Join us for the best fundraiser of the year! All proceeds benefit the Friends of the Avalanche Center which supports avalanche awareness, education and information throughout southwest Montana.

GNFAC Instagram

Lionhead weather station is up.  The early season snow has stuck around most higher elevation, shady slopes, while sunnier slopes have little to no snow.  The remaining snow will be the foundation for this winter's snowpack. #gnfacobsBlue skies, snow capped peaks, and above average temps made for a perfect day to put up the Lionhead weather station.Introducing the GNFAC’s New Website! New look. New feel. Link in bio.
We just launched our new website today and hope you find it easier to navigate and use. There are two major changes:
1. The site is mobile friendly.
At the end of last season 60% people viewed the website on a mobile device (53% smartphone, 7% tablet). Our old site did not accommodate the different sized devices very well, so we upgraded. This site uses Drupal 8 which has a responsive web design making it an effective mobile platform for all devices. 
2. We added Regional Conditions pages to the avalanche advisory.
Our advisory format remains the same but attached to it are links to every region in our area (Bridgers, N-Madison, Cooke, etc.) that will provide a “one-stop” shop of relevant information to a specific region.In the mountains around Cooke City, 1-2 ft. of snow exists above 9,000 ft. This will likely be the foundation of the winter snowpack. #gnfacobs


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.