Hokkaido · Ski & Backcountry · Open data

Read Yotei before you climb it.

An open 3D terrain guide to the Mt Yotei backcountry, built on GSI elevation data. Slope angle, avalanche terrain, and today's conditions — free, for everyone. The decision in the field is always yours.

⛰ Explore in 3D — Mt Yotei 羊蹄山 Safety

● CC BY-SA 4.0 出典：国土地理院（数値標高モデル DEM10B を加工して作成）

GSI elevation dataDEM-based slope analysisOpen data / CC BY-SAEnglish / 日本語

Resorts

Hokkaido's big resorts, in game-grade 3D.

Runs, lifts and terrain at a glance — nine resorts you can spin, tilt and test-ride before you pick today's mountain.

Sapporo Teine

Sapporo · Vertical 860m

Closest to Sapporo · Olympic-legacy terrain

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Rusutsu

Shiribeshi · Vertical 685m

Tri-mountain resort · legendary powder

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Niseko United

Shiribeshi · Vertical 1140m

World-class powder · the legendary four-mountain united area

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Furano

Furano · Vertical 1000m

Near 1000m vertical · dry inland powder

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Kiroro

Akaigawa · Vertical 821m

Huge snowfall · one of Hokkaido’s deepest

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Hoshino Tomamu

Shimukappu · Vertical 730m

Sea-of-clouds resort · family friendly

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Sapporo Kokusai

Sapporo · Vertical 727m

Near Sapporo · wide groomers, reliable snow

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Kamui Ski Links

Asahikawa · Vertical 724m

Asahikawa’s local gem · wide powder faces

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Asahidake

Daisetsuzan · Vertical 1091m

Hokkaido’s highest peak · backcountry powder mecca

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⛷ Resorts →

Backcountry

Beyond the lifts: safety-led planning.

Mt Yotei in 3D, slope-angle avalanche terrain, and today's conditions. The map is a tool for finding danger — the decision in the field is always yours.

01The terrain

Turn it, tilt it, know the mountain.

Explore Mt Yotei's terrain in interactive 3D, modelled from GSI elevation data. Trace the ridgelines, gullies, and descent lines before you go. Scouting from the desk buys you margin in the field.

02Slope & avalanche

See the thirty-degree line.

A slope-angle layer derived from the DEM, shading the 30–45° terrain where avalanches most often release. This map does not remove danger — it helps you find it. The final call must always be made on the ground.

03Today

The mountain wears a new face each morning.

Weather, snowpack, wind direction. Today's conditions and the daily snapshot, gathered in one place. The numbers are only a starting point — read them alongside the official avalanche bulletin, and keep the nerve to turn back.

⛰ Explore in 3D — Mt Yotei 羊蹄山 📖 Learn