Mt. Gassan Backcountry
Mt. Gassan 1,984m · YamagataSpring season
- Avalanche
- No bulletin for this area (Japan Avalanche Network bulletins) ↗
- Rules
- Gassan Local Rules: only the slopes west of the lift (incl. Mt. Ubagatake) are managed. Tour/backcountry users file the form at the lower lift station. Search outside is charged at cost. Official ↗
- Trip plan
- File one. Compass (Japan Mountain Guides Assn.) ↗
This page is not route guidance. It's information to help you decide. Carry avalanche gear, know how to use it, and go with a guide if in doubt.
Terrain
Colours show terrain angle (30° yellow, 35° orange, 40° red, 45°+ purple). Most avalanches start on 30–45° slopes, but no colour does not mean safe. Overlay your own GPX/KML to see distance and slope (the file is read on your device only, never uploaded).
Map & elevation: GSI Japan (slope computed by Japow Now! from the 10 m elevation tiles)
Snow now
| Resort | 24h snow | Depth | Tomorrow |
|---|---|---|---|
| Gassan Ski Resort | 0 cm | 0 cm | 0 cm |
| Yudonosan | 0 cm | 0 cm | 0 cm |
24h snow & depth: JMA AMeDAS (resort-reported depth first) / Forecast: Open-Meteo (resort base)