根石岳山荘

2,550 m · Chino, Nagano · 0.2 km from the summit of Mt. Neishi

A mountain hut at 2,550 m in the col between Neishidake and Mikaburiyama in northern Yatsugatake. It is about 2 hours 15 minutes from the Sakuradaira trailhead via Natsuzawa Kosen and 45 minutes from East Tengu. A high-altitude spring flows beside the hut, which is noted for nearby komakusa flowers, sunrise and sunset views, and the nightscape over the Suwa basin.

2026: open April 25–November 25 · reservation required · sleeps 30

Book: iodake.jp ／ Website: iodake.jp ／ Phone 0266-73-6673

Prices (2026)

1 night with dinner and breakfast, green season: ¥14,000
1 night with dinner, green season: ¥13,000
1 night with breakfast, green season: ¥12,000
Room only, no meals (Green season): ¥11,000
1 night with dinner and breakfast, winter season: ¥16,000
Room only, no meals (Winter season): ¥13,000
Private room (per room): ¥4,000

根石岳山荘 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
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°	1°	0°	-1°	-2°	-2°	-2°	-3°	-2°	4°	7°	8°	6°	2°	2°	2°	2°	2°	5°	9°	7°	5°	3°	3°	3°	4°	7°	10°	9°	2°	-1°	-3°	-5°	-6°	-1°	1°	0°	-5°	-6°	-5°	-6°	-6°	2°	5°	3°	-2°	-2°	-2°	-2°	-2°	2°	3°	-2°	-3°	1°	4°	-2°	-4°	-3°	-2°	-6°	-7°	1°	3°	-5°	-4°	0°	0°	-7°	-6°	2°	5°	-3°	-3°	4°	5°	2°	2°	7°	5°	-2°	-5°	1°	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.		↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓

Facilities and rooms

Open: 2026: open April 25–November 25
Rooms: dormitory, private rooms
Bedding: provided
Water: Spring beside lodge. Free drinking water and hot water for overnight guests
Toilet: true
Bath: Free for overnight guests. Late June–mid-October; suspended during water shortages. No showers
Location: 36.013977, 138.359279

Mountains near 根石岳山荘

Huts, campsites and lodging near 根石岳山荘

Mountain huts

Campsites

本沢温泉テント場 1.3 km
夏沢だけかんばキャンプ場 1.3 km
黒百合ヒュッテテント場 1.7 km
ミドリ池キャンプ場 2.3 km
赤岳鉱泉テント場 3.0 km

Lodging

Karasawa Kousen 2.9 km
稲子湯 4.9 km

Mountains and hiking routes in Nagano