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Avalanche Savvy · Snowmobile Terrain

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Avalanche terrain

ATES terrain classes Opacity CAIC avalanches 2025/26

Riding

Snowmobile trails (North Routt, CO) Snowmobile trails (WY) Groomed trails (COTREX, CO) Trail notes & cautions Parking areas Steamboat Lake State Park

Closures

Rabbit Ears / Buff Pass use zones Suggested non-motorized (Hahns Peak) No-snowmobiling areas (approx.) Wilderness — no motorized (USFS)

Basemap

USGS Topo USGS Imagery

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About this map

This is a research product, not an operational terrain rating. Terrain classes come from the automated autoATES v3.0 model, which was calibrated on western Canada data and has not been validated here. It can be wrong. Nothing on this map replaces avalanche training, the current CAIC forecast, and your own judgement.

ATES classes: 1 Simple, 2 Challenging, 3 Complex, 4 Extreme (5 m resolution). Coverage grows as model runs finish — blank areas are unprocessed, not safe.

Terrain: USGS LiDAR resampled to 5 m. Forest: NLCD Tree Canopy Cover 2021. Trails & closures: WY State Parks 2026, USFS, COTREX — closure polygons are approximate; obey posted signs. Avalanche observations: CAIC 2025/26.

A project of Avalanche Savvy.