A major component of pre-trip preparation is information gathering. One of the best ways to avoid
getting caught in an avalanche is to choose routes that are appropriate for the conditions. Chose
an appropriate route based on its exposure to avalanche terrain. These areas have been rated
according to the Avalanche Terrain Exposure Scale.
The online Trip Planner has an embedded Google Maps interactive interface. Left click on the
coloured polygon. The ATES attributes come up - those that are highlighted are the attributes
applicable to the area that led the classification decision. Left click on the Snowflake icon for a
destination and a summary of cautions and mitigation measures will come up.
Any given piece of mountain terrain may have elements that will fit into multiple classes. Applying
a terrain exposure rating involves considering all of the variables on the matrix with some default
The ATES classification is a function of scale and zoom limitation is set to ensure it is not
interpreted at a fine scale. ATES zoning maps are not intended for route finding, more for pre-trip
Planning a trip? See the Pre-Trip Planning
on the Canadian Avalanche Centre website.
White Pass Trailhead Sign
Haines Pass Trailhead Sign
Tombstone Territorial Park Trailhead Sign
White Pass ATES Brochure (7.1MB)
Haines Summit ATES Brochure (2.8MB)