Also on the map ofDewa MountainsBandai-Asahi National Park
Mount Gassan
- Easiest route
- 4.3 km+791 m · about 2.5 h · T2
- Prominence
- 1,477 m4,846 ft
- Isolation
- 60 km
- Tonight
- 5°CHeavy rain · Wind 10 km/h SE
Mount Gassan is a 1,984 m (6,509 ft) stratovolcano in the Dewa Mountains, Yamagata Prefecture, Japan.
All facts
- Elevation
- 1,984 m · 6,509 ft
- Nearest higher peak
- Mount Chōkai (2,236 m)
- Range
- Dewa Mountains
- Region
- Yamagata Prefecture, Japan
- Protected area
- Bandai-Asahi National Park
- Spanish name
- Monte Gassan
- Coordinates
- 38.5485° N, 140.0271° E
How to get to the top of Mount Gassan
3 mapped walking routes from where a car can get you, with distance and climb from the terrain model.
Easiest route: from Road end, 3.5 km SSW of Mount Gassan
- Distance
- 4.3 kmone way
- Climb
- +791 m−7 m (2,595 ft up)
- Time up
- about 2.5 h
- Difficulty
- T2Mountain trail, sure footing needed
Other routes 2
Routes © OpenStreetMap contributors, available under the ODbL. Climb from the terrain model. Trails change and maps miss things: check conditions locally.
Mount Gassan 3D map
Drag to orbit · click, then scroll to zoom (or Ctrl/⌘ + scroll) · One finger scrolls the page · two fingers orbit and zoom · 10 × 10 km
Mount Gassan terrain and contours
50 m contours from the Copernicus GLO-30 terrain model. The route drawn is the easiest mapped one. Click two points on the map to draw your own cross-section.Tap two points on the map to draw your own cross-section.
West → east through the summit
Mount Gassan weather
Today · Heavy rain · 5 / 7°C (41 / 45°F) · 31.4 mm · Wind 10 km/h SE
Mount Gassan forecast for the summit, about 1,984 m. Summit vs base: the Base line is for about 1,191 m.
- Today5°7°31.4 mm10 km/h SEBase 10 / 12°
- Sun2°8°4.9 mm9 km/h NWBase 6 / 13°
- Mon1°5°5.6 mm12 km/h SEBase 6 / 10°
- Tue-3°5°16.1 mm27 km/h NWBase 2 / 10°
- Wed-6°-5°6.6 mm23 km/h NWBase -1 / 0°
- Thu-2°1°–10 km/h SEBase 3 / 6°
- Fri3°8°5.3 mm10 km/h WBase 7 / 13°
- Sat-4°4°23.0 mm20 km/h NWBase 1 / 9°
- Sun-3°-2°10.8 mm21 km/h NWBase 2 / 2°
- Mon-5°0°14.3 mm18 km/h NWBase -1 / 5°
Forecast data: MET Norway, CC BY 4.0; daily low and high, precipitation total and strongest wind from the hourly data, model run Oct 23, 23:19 UTC.
Camping & parking near Mount Gassan
Campsites, parking, trailheads and mountain huts mapped in OpenStreetMap around Mount Gassan, nearest first, by straight-line distance. Check access, fees and permits locally.
Nearest hut
月山頂上小屋
Nearest parking
姥沢駐車場
How steep is the route to Mount Gassan?
The easiest mapped route, 4.3 km from 1,191 m to 1,984 m. Steepest stretch: 35°.
- 0–15°3.5 km
- 15–30°0.7 km
Grades are averaged between profile points about 40 m apart, so short steeper steps don’t show.
Land cover
ESA WorldCover 10 m classification of the same area.
Snow & ice means glaciers and year-round snow (a yearly average), not today’s snow cover.
Nearby summits
Named peaks within 5 km, measured from the Mount Gassan summit.
Summit list 5
- 1Mount Uba670 m 2.3 km SW
- 2Mt. Amamori1,309 m 2.5 km NW
- 3千本松山1,255 m 4.1 km ESE
- 4Mount Yudono1,504 m 4.2 km WSW
- 5品倉山1,211 m 4.9 km W
Where Mount Gassan sits
- Range
- Dewa Mountains3
- Region
- Yamagata Prefecture4Japan153Asia964
- Protected area
- Bandai-Asahi National Park8
Nearby places
Mount Gassan downloads: topographic map, heightmap, STL 3D model and DEM
Free files made in your browser from this page's terrain data. No sign-up; credit the sources below.
Print & wall
3D printing & 3D apps
Free to use with credit: see the data sources
How accurate is this?
within 10 m This 3D map reads 1,980 m at the summit; the official height is 1,984 m.
A 30 m terrain model averages each cell, so a few metres either way is normal.
| Source | Summit | Difference |
|---|---|---|
| Official height (Wikidata) | 1,984 m | — |
| Copernicus GLO-30 (used on this page) | 1,980 m | -4 m |
| Copernicus GLO-90 | 1,970 m | -14 m |
Data sources
- Terrain
- Produced using Copernicus WorldDEM-30 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved. The European Union, ESA, DLR and Airbus incur no liability for any use of this data and do not endorse this service.
- Imagery
- Contains modified Copernicus Sentinel data 2025 (scene 2025-09-28)
- Land cover
- © ESA WorldCover project 2021 / Contains modified Copernicus Sentinel data (2021) processed by ESA WorldCover consortium
- Facts
- Wikidata (CC0)
- Routes, Camping & parking
- © OpenStreetMap contributors (ODbL)
- Summits
- © OpenStreetMap contributors, via Overture Maps Foundation (ODbL)
- Accuracy comparison, Panorama
- Includes Copernicus WorldDEM-90 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved. The European Union, ESA, DLR and Airbus incur no liability for any use of this data and do not endorse this service.
- Forecast
- Weather forecast from MET Norway (CC BY 4.0)
- Sources
- Official website · Wikidata · OpenStreetMap · GeoNames · Wikipedia