Hiking trails · Nagano

Yatsugatake Return to Mount Io via the Unjo-no-yu Bath at Honzawa Onsen and Natsuzawa Pass

八ヶ岳 本沢温泉の雲上の湯を経て夏沢峠から硫黄岳へ往復

Distance

16.1 km

Hiking time

8 h 45 min

Ascent

1,212 m

Descent

1,212 m

Plan this hike

Hiking time is an estimate for an average hiker, without breaks.

From the Honzawa entrance in Minamimaki, Nagano, the route climbs to Honzawa Onsen at 2,150 m, famous for Unjo-no-yu, called Japan's highest open-air bath, and on to Natsuzawa Pass with its two huts. From the pass it continues up the ridge to 2,760 m Mount Io and back. The broad summit ends abruptly in great northern cliffs formed by collapse, and above about 2,600 m the slopes turn to dwarf pine and alpine plants.

Mount Iō summit weather (2,760 m, 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	6°	1°	0°	-2°	-3°	-3°	-3°	-4°	-3°	3°	5°	6°	4°	0°	0°	0°	1°	0°	4°	8°	6°	3°	2°	1°	1°	1°	6°	9°	8°	2°	-1°	-4°	-6°	-7°	-2°	0°	-1°	-6°	-7°	-7°	-8°	-8°	0°	5°	5°	-1°	-2°	-3°	-3°	-3°	1°	4°	-2°	-3°	1°	3°	-3°	-5°	-4°	-2°	-8°	-9°	-1°	2°	-6°	-6°	-1°	1°	-8°	-8°	0°	4°	-5°	-6°	2°	4°	0°	0°	6°	7°	-3°	-7°	-1°	3°
Precipitation	mm														0.1	0.1	2.9	9	4.5	0.1	0.1	1.2					0.1																																0.1	0.2																		8	11		0.3	0.2
New snow	cm																																																										<.1	0.2
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	1	1	1	1	1	1	1	2	3	2	2	2	2	1	1	2	1	1	0	1	1	1	2	3	4	4	2	2	2	2	3	4	4	3	2	2	2	2	1	2	1	1	0	0	1	1	2	1	2	2	2	2	4	2	3	5	3	1	2	2	3	1	2	2	2	1	2	2	2	1	1	1	1	1	1	2	4	2	2	1	2
Wind gusts	m/s	8	5	4	5	5	5	5	5	4	6	8	9	9	9	10	11	11	9	7	7	9	8	6	8	9	10	12	15	16	14	12	11	12	14	17	18	17	14	10	9	9	9	8	7	8	6	6	7	7	8	8	13	8	6	8	14	13	16	22	21	14	7	8	12	10	10	11	12	10	8	7	8	6	7	7	10	9	12	11	16	15	9	6	7
Wind dir.		↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓	↓

Yatsugatake Return to Mount Io via the Unjo-no-yu Bath at Honzawa Onsen and Natsuzawa Pass facts