Areas · Niseko / Shiribeshi

Iwaonupuri

↕ 691 m · 2 Routes · Explore in 3D

🌋 Iwaonupuri is an active volcano of the Niseko volcanic group (JMA-listed and monitored; no volcanic alert level is currently operated and no access restriction is in force). The crater area west of the summit is sulphur/geothermal ground with recorded historical fumarole activity. Check the latest JMA volcano information before touring.

📅 Today — Today's conditions

⚠️ Every Yotei route is advanced, Complex avalanche terrain (max slope ~37–47°). Not a first tour; not for unguided AST-1 parties.

出典：国土地理院（標高タイル DEM10B を加工して作成） / CC BY-SA 4.0

Today's conditions

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Safety

Routes

Iwaonupuri — NE Chute

Vertical356 m Distance5.3 km Max slope53°

↘ NE·E·S · Terrain class (auto, not official ATES): Complex

Iwaonupuri — Goshiki Onsen Route

Vertical340 m Distance3.6 km Max slope44°

↘ S·SW·SE · Terrain class (auto, not official ATES): Complex

📍 Access & terrain features

Waypoints from the route GPX — verify in the field. True summit 1898 m (DEM ~1893 m).

Parking / trailhead Large snow-cleared parking area 759 m

⚠ Hazard Avalanche risk 1035 m

Summit / crater Iwaonupuri Summit (1116m) 1113 m

Terrain note Recommended to check snowpack (same aspect as chute) 1010 m

Terrain note Iwaonupuri Bowl 1005 m

Terrain note Iwaonupuri NW Chute 984 m

Terrain note Alternative route 944 m

Terrain note Alternative descent 926 m

Terrain note Ascent route 867 m

Terrain note Goshiki Onsen 739 m

Terrain note Goshiki Onsen Hotsprings 739 m