Avalanche Maps

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"What's the danger?" Here are autogenerated DEM Shading rules for each advisory zone that allow for quickly adding avalanche danger, problems, and sun angle layers to CalTopo maps. Reports sourced from avalanche.org.

Zones by Region

Alaska

• Cordova
• Eastern Alaska Range
• Haines Chilkat Pass
• Haines Lutak
• Haines Transitional
• Valdez Continental
• Valdez Intermountain
• Valdez Maritime
• Chugach State Park
• Seward and Lost Lake
• Summit Lake
• Turnagain Pass
• Cordova City/Borough
• Juneau
• Juneau
• Hatcher Pass

California

• Bridgeport Winter Recreation Area Saturday, March 18, 2023 7:13AM
• Eastside Region Monday, March 20, 2023 7:00AM
• Mount Shasta Monday, March 20, 2023 6:17AM
• Central Sierra Nevada Monday, March 20, 2023 7:00AM

Wyoming

• Greys River Monday, March 20, 2023 5:48AM
• Tetons Monday, March 20, 2023 5:41AM
• Togwotee Pass Monday, March 20, 2023 6:03AM
• Big Horns
• Sierra Madre
• Snowy Range

Oregon

• Central Cascades Sunday, March 19, 2023 9:09PM
• Newberry
• Mt Hood Sunday, March 19, 2023 6:30PM
• Blues
• Elkhorns
• Northern Wallowas
• Southern Wallowas

Montana

• Flathead Range & Glacier NP Monday, March 20, 2023 5:48AM
• Swan Range Monday, March 20, 2023 5:48AM
• Whitefish Range Monday, March 20, 2023 5:48AM
• Bridger Range
• Cooke City
• Island Park
• Lionhead Area
• Northern Gallatin Range
• Northern Madison Range
• Southern Gallatin Range
• Southern Madison Range
• Kootenai
• Bitterroot
• Rattlesnake
• Seeley Lake

Idaho

• Selkirks & Cabinets
• St. Regis & Silver Valley
• PAC Advisory Area
• Banner Summit Monday, March 20, 2023 6:12AM
• Galena Summit & Eastern Mtns Monday, March 20, 2023 6:11AM
• Sawtooth & Western Smoky Mtns Monday, March 20, 2023 6:12AM
• Soldier & Wood River Valley Mtns

Arizona

• San Francisco Peaks / Kachina Peaks Wilderness Monday, March 20, 2023 6:40AM

New Hampshire

• Presidential Range Monday, March 20, 2023 4:01AM

Washington

• East Slopes Central Sunday, March 19, 2023 6:30PM
• East Slopes North Sunday, March 19, 2023 6:30PM
• East Slopes South Sunday, March 19, 2023 6:30PM
• Olympics
• Snoqualmie Pass Sunday, March 19, 2023 6:30PM
• Stevens Pass Sunday, March 19, 2023 6:30PM
• West Slopes Central Sunday, March 19, 2023 6:30PM
• West Slopes North Sunday, March 19, 2023 6:30PM
• West Slopes South Sunday, March 19, 2023 6:30PM

New Mexico

• Northern New Mexico Monday, March 20, 2023 6:47AM

Utah

• Abajos
• Logan
• Moab
• Ogden
• Provo
• Salt Lake
• Skyline
• Southwest
• Uintas

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