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Custer Gallatin National Forest

Flash Flood Watch issued September 19 at 3:09AM MDT until September 20 at 12:00AM MDT by NWS Great Falls MT

3:09 AM — 3:15 PM

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Horse Gulch area and burn scars from the summer of 2026. * WHERE...A portion of central Montana, including the following areas, Big Belt, Bridger and Castle Mountains, Elkhorn and Boulder Mountains and Little Belt and Highwood Mountains. * WHEN...Through this evening. * IMPACTS...Heavy rainfall over the Horse Gulch area and burn scars from the summer of 2026 is expected up to and during the period of the watch. Residents near the Horse Gulch area and burn scars from the summer of 2026 should prepare for potential debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, urbanized street flooding, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over recent burn scars, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Areas near recent burn scars from the summer 2026 and the Horse Gulch area. - http://www.weather.gov/safety/flood

Flood Watch issued September 19 at 3:09AM MDT until September 19 at 6:00PM MDT by NWS Great Falls MT

3:09 AM — 3:15 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of central and southwest Montana, including the following areas, in central Montana, Canyon Ferry Area, Helena Valley and Meagher County Valleys. In southwest Montana, Gallatin Valley. * WHEN...Through this afternoon. * IMPACTS...Excessive runoff may result in flooding of low-lying and flood-prone locations. * ADDITIONAL DETAILS... - An area of rain will bring additional precipitation amounts to around 1.00 inch today with locally higher amounts near the mountains. - http://www.weather.gov/safety/flood

Flood Watch issued September 19 at 1:34AM MDT until September 20 at 6:00PM MDT by NWS Riverton WY

1:34 AM — 6:00 PM

* WHAT...Flash flooding caused by moderate to heavy rainfall is possible, especially in terrain and poor drainage areas. * WHERE...Portions of central, north central, and northwest Wyoming, including the following areas, in central Wyoming, Owl Creek and Bridger Mountains. In north central Wyoming, Bighorn Mountains Southeast, Bighorn Mountains West, Northeast Johnson County and Southeast Johnson County. In northwest Wyoming, Absaroka Mountains, Cody Foothills and Yellowstone National Park. * WHEN...Through Sunday afternoon. * IMPACTS...Excessive rainfall may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas and around steep terrain. * ADDITIONAL DETAILS... - A slow moving weather system will move across Wyoming today through Sunday and bring rounds of showers and thunderstorms to the region, especially northern Wyoming. Any shower or thunderstorm could produce moderate to heavy rainfall across the Watch Area. - http://www.weather.gov/safety/flood

Overview

Custer Gallatin National Forest is open and encompasses over 3 million acres of diverse terrain stretching across Montana and into South Dakota, spanning seven ranger districts and serving as a critical part of the Greater Yellowstone Ecosystem. Fire danger is currently LOW across all districts. The forest operates under a mandatory food storage order forest-wide—critical for bear safety in this bear country. Current notable restrictions and closures include: Glacier Lake Road (NFSR #2421) closed seasonally through late spring 2026; West Fork Fire area road/trail closure through December 31, 2025; a permanent pallet possession ban on Bozeman Ranger District to protect resources; and the Hyalite Porcupine Buffalo Horn Wilderness Study Area under over-snow vehicle restrictions per court order. Prescribed burns are planned October 2025 through May 2026 across districts. Recent severe storms caused trail damage in the Bridger Range, with Truman Gulch Trail partially closed. Recreational target shooting is permanently prohibited in Hyalite Creek Drainage. The forest offers extensive recreation from wilderness areas (Absaroka-Beartooth) to numerous campgrounds and rental cabins. Headquarters are in Bozeman with additional offices in Billings. Winter users should check avalanche conditions and note that some trails have seasonal bike/wheeled vehicle restrictions.

Campgrounds

ANDERSON CAMP Aspen Campground Baker's Hole Campground Bakers Hole Basin Campground Basin Montana Campground Basin Station Cabin Battle Ridge Campground Bear Creek Campground - Mt Beaver Creek Cabin Beaver Creek Campground Big Beaver Campground Big Creek Campground Blacks Pond Campground Cabin Creek Cabin Cabin Creek Campground Canyon Campground Cascade Cherry Creek Campground Chippy Park Campground Chisholm Campground Cinnamon Guard Station Cinnamon Lookout Colter Campground Cow Creek Campground And Picnic Area Crandall Creek Cabin Deer Creek Cabin Diamond Butte Lookout

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