Mt. Neishi
根石岳
Chino, Nagano · Elevation 2,603 m
A 2,603 m peak in the Yatsugatake range in Chino City, Nagano, set on the ridge between Mt. Tengu and Mt. Iō. The summit gives close views of the main Yatsugatake peaks — Tengu, Iō, and Akadake — and is known for the komakusa colonies that flower among its hai-matsu pine slopes. Neishidake-sansō stands just below the summit, and the peak is reached from Sakura-daira, Honzawa-onsen, and Kuroyuri Hütte trailheads. It lies within Yatsugatake-Chūshin Kōgen Quasi-National Park.
Mt. Neishi 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 Neishi Return from Sakudaira via Natsuzawa Onsen and Natsuzawa Pass: about 5 h 44 min, 9.4 km, about 800 m of climbing.
Mt. Neishi weather (hourly, 14 days)
Sunrise today 06:10, sunset 16:50
| 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 | 15 | 17 | 19 | 21 | 23 | 1 | 3 | 5 | 7 | 9 | 11 | 13 | 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 | 18 | 21 | 0 | 3 | 6 | 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 | 3 | 9 | 15 | |
| Temperature | °C | 5° | 0° | -1° | -2° | -2° | -2° | -2° | -3° | -2° | 4° | 7° | 8° | 6° | 2° | 2° | 2° | 2° | 2° | 5° | 8° | 7° | 4° | 3° | 3° | 3° | 3° | 7° | 9° | 9° | 2° | -1° | -4° | -6° | -7° | -1° | 1° | 0° | -5° | -6° | -6° | -6° | -6° | 1° | 5° | 3° | -2° | -2° | -3° | -2° | -2° | 1° | 3° | -3° | -4° | 1° | 3° | -2° | -4° | -3° | -2° | -7° | -7° | 0° | 3° | -6° | -4° | 0° | 0° | -7° | -6° | 2° | 5° | -3° | -3° | 4° | 5° | 2° | 2° | 7° | 5° | -2° | -6° | 0° | 4° |
| Precipitation | mm | 2.3 | 8 | 3.9 | 0.4 | 0.7 | 0.1 | 0.1 | 0.3 | 0.3 | 0.2 | 9 | 11 | 1.4 | 0.8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| New snow | cm | 0.2 | 0.2 | <.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 | 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 | 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 |
| Wind | m/s | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 2 | 1 | 2 | 3 | 3 | 1 | 1 | 2 | 2 | 2 | 3 | 4 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 2 | 1 | 1 | 2 | 4 | 2 | 3 | 5 | 4 | 1 | 1 | 2 | 2 | 0 | 1 | 3 | 2 | 1 | 1 | 1 | 2 | 1 | 2 | 3 | 2 | 2 | 2 | 2 | 3 | 2 | 1 | 1 | 1 |
| Wind gusts | m/s | 7 | 6 | 4 | 4 | 5 | 5 | 4 | 4 | 4 | 5 | 6 | 7 | 7 | 10 | 11 | 11 | 11 | 10 | 7 | 6 | 10 | 9 | 8 | 9 | 10 | 10 | 11 | 12 | 13 | 11 | 10 | 11 | 12 | 12 | 14 | 15 | 14 | 11 | 8 | 8 | 8 | 8 | 7 | 7 | 8 | 6 | 7 | 8 | 9 | 9 | 9 | 11 | 7 | 5 | 8 | 17 | 14 | 15 | 21 | 23 | 17 | 8 | 8 | 11 | 9 | 8 | 11 | 13 | 10 | 7 | 6 | 7 | 7 | 8 | 10 | 14 | 12 | 16 | 13 | 13 | 13 | 8 | 5 | 7 |
| Wind dir. | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | ↓ | |
Mt. Neishi hiking routes
Hiking times are estimates calculated from the terrain.
Huts, campsites and lodging near Mt. Neishi
Mountain huts
- 根石岳山荘 2026: open April 25–November 25 · reservation required · sleeps 30
- Hutte Natsuzawa 2026: open July 1–August 31 · reservation required
- Yamabikoso temporarily closed
- 本沢温泉 2026: open all year · reservation required · sleeps 100
- Oren hut 2026: open April 25–November 1 · reservation required · sleeps 80
Campsites
- 本沢温泉テント場
- 夏沢だけかんばキャンプ場
- 黒百合ヒュッテ テント場
- ミドリ池キャンプ場
- 赤岳鉱泉テント場
Lodging
- Karasawa Kousen
- 稲子湯
Mt. Neishi facts
- Elevation
- 2,603 m
- Location
- Chino, Nagano
36.015513, 138.360212 - National Park
- 八ヶ岳中信高原国定公園
- Website
- iodake.jp
- Trail Map
- mt-yatsugatake.jp (PDF)
- Wikipedia
- ja.wikipedia.org