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Sumon Dake

Japan · 1537 m

Reviewed routes

No reviewed route is included. Missing route information does not establish safe or legal access.

About this mountain

Country

Japan

Latitude

37.3977778

Local Name

守門岳

Longitude

139.1366667

Orientation

Hakama-dake is the main peak within a system that also includes Seiun-dake, O-dake and Nakatsumata-dake.

Name

Sumon Dake

Elevation (m)

1537

Region

Niigata

Sources and scope

selected Sumon-dake summit

Sumon-dake mountain system

Access & planning

Routes
Options
  • Name

    Futakuchi

    Grade

    3-B

    Time (hours)

    6.5

    Distance (km)

    9.4

    Ascent (m)

    1010

  • Name

    Ohara

    Grade

    3-B

    Time (hours)

    7

    Distance (km)

    6.9

    Ascent (m)

    900

  • Name

    Irishiogawa

    Grade

    5-B

    Time (hours)

    9.3

    Distance (km)

    28.3

    Ascent (m)

    1860

  • Name

    Yoshigahira–O-dake–Hakama-dake

    Level

    intermediate or above

    Ascent Hours Approx

    6

    Descent Hours Approx

    5

Current information

Verify current trail and road status with the responsible municipality before travel.

Hazards
Items

  • Seasonal road closures normally affect some approaches from mid-November to late May.

  • Residual snow can create route-finding and avalanche hazards.

  • The Yoshigahira approach includes steep terrain, a documented wrong river-crossing path, and bear risk.

  • Deteriorated boardwalk sections may be slippery; check current maintenance information.

Sources and scope

three officially graded Sumon-dake routes in snow-free good-weather conditions

Yoshigahira approach via O-dake to Hakama-dake

Permits & local services

Hazards
Items

  • Seasonal road closures normally affect some approaches from mid-November to late May.

  • Residual snow can create route-finding and avalanche hazards.

  • The Yoshigahira approach includes steep terrain, a documented wrong river-crossing path, and bear risk.

  • Deteriorated boardwalk sections may be slippery; check current maintenance information.

Operations
Planning

  • Submit a climbing plan and share the itinerary.

  • Carry emergency food.

  • Check current trail, road, weather and snow information before departure.

Sources and scope

Sumon-dake approaches and general Niigata mountain operations

Nature & wildlife

The broader mountain system includes extensive beech forest and alpine-plant habitat; this is not a summit-specific species-occurrence claim.

Sources and scope

Sumon-dake mountain system, not summit-specific species occurrence

Culture & local context

Sumon Daimyojin is enshrined on O-dake, a component peak of the mountain system.

Sources and scope

O-dake, a component peak of the Sumon-dake system; not the Hakama-dake summit

Conservation

Hazards
Items

  • Seasonal road closures normally affect some approaches from mid-November to late May.

  • Residual snow can create route-finding and avalanche hazards.

  • The Yoshigahira approach includes steep terrain, a documented wrong river-crossing path, and bear risk.

  • Deteriorated boardwalk sections may be slippery; check current maintenance information.

Conservation

Sumon Dake lies within Echigo Sanzan-Tadami Quasi-National Park. Stay on formal boardwalks and trails where open to avoid trampling adjacent vegetation.

Sources and scope

managed ridgeline boardwalk project area on Sumon-dake

Echigo Sanzan-Tadami Quasi-National Park

Safety & conditions

Routes
Options
  • Name

    Futakuchi

    Grade

    3-B

    Time (hours)

    6.5

    Distance (km)

    9.4

    Ascent (m)

    1010

  • Name

    Ohara

    Grade

    3-B

    Time (hours)

    7

    Distance (km)

    6.9

    Ascent (m)

    900

  • Name

    Irishiogawa

    Grade

    5-B

    Time (hours)

    9.3

    Distance (km)

    28.3

    Ascent (m)

    1860

  • Name

    Yoshigahira–O-dake–Hakama-dake

    Level

    intermediate or above

    Ascent Hours Approx

    6

    Descent Hours Approx

    5

Current information

Verify current trail and road status with the responsible municipality before travel.

Hazards
Items

  • Seasonal road closures normally affect some approaches from mid-November to late May.

  • Residual snow can create route-finding and avalanche hazards.

  • The Yoshigahira approach includes steep terrain, a documented wrong river-crossing path, and bear risk.

  • Deteriorated boardwalk sections may be slippery; check current maintenance information.

Operations
Planning

  • Submit a climbing plan and share the itinerary.

  • Carry emergency food.

  • Check current trail, road, weather and snow information before departure.

Conservation

Sumon Dake lies within Echigo Sanzan-Tadami Quasi-National Park. Stay on formal boardwalks and trails where open to avoid trampling adjacent vegetation.

Sources and scope

Yoshigahira approach via O-dake to Hakama-dake

Sumon-dake approaches and general Niigata mountain operations

managed ridgeline boardwalk project area on Sumon-dake