Mt. Kassen
合戦沢の頭
Azumino, Nagano · Elevation 2,488 m
A 2,488 m shoulder peak on the Kassen Ridge between Nakabusa Onsen and Mt. Tsubakurodake, in Azumino City, Nagano Prefecture. Sitting just above the Kassen Hut on one of the Northern Alps' 'three steepest ascents', it marks the start of the Omote-Ginza traverse leading via Mt. Tsubakuro and Mt. Otensho to Mt. Yari. The peak lies within Chūbu Sangaku National Park.
Mt. Kassen at a glance
- Weather: The most settled day in the next 7 days is Wed, November 4: clear, gusts up to 7 m/s.
- Route: The shortest is Mount Tsubakuro via Kassen Ridge from Nakabusa Onsen: about 7 h 44 min, 11.2 km, about 1,430 m of climbing.
Mt. Kassen weather (hourly, 14 days)
Sunrise today 06:13, sunset 16:52
| Tue, 11/3 | Wed, 11/4 | Thu, 11/5 | Fri, 11/6 | Sat, 11/7 | Sun, 11/8 | Mon, 11/9 | Tue, 11/10 | Wed, 11/11 | Thu, 11/12 | Fri, 11/13 | Sat, 11/14 | Sun, 11/15 | Mon, 11/16 | Tue, 11/17 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Japan time | 21 | 23 | 1 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | 0 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 0 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 0 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 0 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 0 | 3 | 6 | 9 | 12 | 15 | 21 | 3 | 9 | 15 | 21 | 3 | 9 | 15 | 21 | 3 | 9 | 15 | 21 | 3 | 9 | 15 | 21 | 3 | 9 | 15 | 21 | 3 | 9 | 15 | 21 | 3 | 9 | 15 | 21 | 3 | 9 | 15 | 21 | |
| Temperature | °C | -4° | -3° | -2° | -3° | -3° | -1° | 2° | 5° | 6° | 6° | 2° | 2° | 2° | 2° | 2° | 3° | 4° | 7° | 7° | 5° | 5° | 4° | 4° | 3° | 5° | 7° | 6° | 2° | 0° | -1° | -2° | -4° | -3° | -1° | -2° | -5° | -6° | -7° | -7° | -7° | 0° | 2° | 1° | -3° | -3° | -2° | -2° | -1° | 1° | 5° | 2° | -7° | -8° | 0° | 2° | -2° | -6° | -4° | -2° | -7° | -7° | -1° | 1° | -7° | -3° | -1° | 0° | -5° | -5° | 1° | 4° | -3° | -4° | 4° | 4° | 2° | 2° | 5° | 4° | -2° | -4° | -2° | 2° | -4° |
| Precipitation | mm | 4.3 | 7 | 4.0 | 1.2 | 0.5 | 0.8 | 0.3 | 1.7 | 0.4 | 4.4 | 2.2 | 0.2 | 0.2 | 0.2 | 0.4 | 0.2 | 0.5 | 0.6 | 0.4 | 0.2 | 0.8 | 0.1 | 1.4 | 4.0 | 2.3 | 0.2 | 0.4 | 0.2 | 0.6 | 9 | 11 | 1.4 | 0.5 | 0.9 | 0.5 | |||||||||||||||||||||||||||||||||||||||||||||||||
| New snow | cm | <.1 | <.1 | <.1 | 0.1 | 0.1 | 0.2 | 0.5 | 0.6 | 0.4 | 0.2 | <.1 | <.1 | <.1 | <.1 | <.1 | <.1 | 0.7 | 2.9 | 2.2 | <.1 | 0.1 | 0.1 | <.1 | <.1 | <.1 | <.1 | <.1 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Snow depth | cm | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | <1 | <1 | <1 | 1 | 1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | 1 | 3 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 | <1 |
| Wind | m/s | 2 | 1 | 1 | 1 | 0 | 0 | 1 | 2 | 2 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 2 | 1 | 0 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 3 | 1 | 4 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 2 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 0 | 1 | 1 | 1 |
| Wind gusts | m/s | 8 | 7 | 6 | 5 | 4 | 4 | 5 | 7 | 7 | 7 | 6 | 4 | 5 | 5 | 6 | 8 | 7 | 7 | 7 | 7 | 10 | 10 | 13 | 9 | 10 | 11 | 13 | 11 | 12 | 11 | 12 | 12 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 10 | 8 | 6 | 6 | 6 | 6 | 9 | 11 | 10 | 10 | 9 | 8 | 6 | 7 | 7 | 14 | 12 | 20 | 21 | 12 | 7 | 5 | 6 | 6 | 7 | 8 | 8 | 8 | 7 | 5 | 5 | 6 | 6 | 7 | 8 | 10 | 11 | 12 | 11 | 11 | 9 | 5 | 5 | 7 | 6 |
| Wind dir. | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | |
Mt. Kassen hiking routes
- Mount Tsubakuro via Kassen Ridge from Nakabusa Onsen 11.2 km · Ascent 1,433 m 町営第一駐車場, 第二駐車場 (parking)
- Mount Tsubakuro, North Mount Tsubakuro, and Mount Otensho Return from Nakabusa Onsen 21.1 km · Ascent 2,168 m Tubakuro-dake Trailhead, 中房温泉のりば (Bus stop), 中房温泉駐車場
Hiking times are estimates calculated from the terrain.
Huts, campsites and lodging near Mt. Kassen
Mountain huts
- 合戦小屋
- 燕山荘 2026: open April 25–November 22 · reservation required · sleeps 650
- 湯俣山荘 2026: open July 18–November 7 · reservation required · sleeps 25
- Seiranso
- 晴嵐荘 湯俣温泉 2026: open July 17–October 18 · reservation required · sleeps 30
Campsites
- 合戦小屋テント場
- 燕山荘テント場
- 晴嵐荘テントサイト
Lodging
- 中房温泉
- 安曇野市営有明荘
Mt. Kassen facts
- Also known as
- 合戦沢ノ頭
- Elevation
- 2,488 m
- Location
- Azumino, Nagano
36.395361, 137.725360 - National Park
- 中部山岳国立公園
- Website
- www.go-nagano.net
- Trail Map
- www.enzanso.co.jp
- Access Information
- www.enzanso.co.jp