Mount Iwasuge

岩菅山

Yamanouchi, Nagano · Elevation 2,295 m

Mount Iwasuge is a 2,295 m peak in Yamanouchi Town, Shimo-Takai District, Nagano Prefecture, regarded as the master peak of the Shiga Highlands. A first-class triangulation point sits on the summit, with the higher Ura-Iwasuge (2,341 m, the highest peak of Shiga Kōgen) just to the northwest. Set in the heart of Jōshin'etsu-kōgen National Park, it appears in the Nihon Nihyaku Meizan, the Ittō-Sankakuten Hyakumeizan, the Shinshū Hyakumeizan, and the Onsen Hyakumeizan. The summit commands a sweeping panorama from Fuji and Ontake to the Northern Alps and even Sado Island in good weather, and the high ridge holds 4 km of 2,100–2,200 m terrain. The standard traverse climbs from Takamagahara or the Hoppo gondola via Higashidate-yama and Terakoya-mine to the Nokkiri junction and the summit, then descends to Ichinose Ski Resort (about 18.5 km, 6.5 hours); a shorter out-and-back from Ichinose via Kosaburo-goya-ato and Araita-zawa is also popular.

Mount Iwasuge at a glance

Weather: The most settled day in the next 7 days is Wed, November 4: clear, gusts up to 8 m/s. Sat, Nov 7: strong wind (gusts up to 15 m/s).
Route: The shortest is Shiga Kogen, over Mount Iwasuge to Ura-Iwasuge, the Plateau's Highest Peak, and Back: about 7 h 30 min, 12.2 km, about 960 m of climbing.

Mount Iwasuge weather (hourly, 14 days)

Sunrise today 06:11, sunset 16:48

		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		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	-6°	-6°	-6°	-5°	-5°	-3°	2°	5°	6°	5°	0°	-1°	-1°	0°	1°	3°	6°	8°	8°	5°	4°	4°	2°	3°	4°	8°	7°	1°	-1°	-3°	-4°	-5°	-4°	-2°	-4°	-7°	-7°	-7°	-8°	-8°	-6°	-4°	-5°	-7°	-4°	-5°	-3°	-3°	1°	4°	-1°	-5°	-4°	-1°	0°	-4°	-6°	-7°	-6°	-6°	-6°	-3°	-2°	-8°	-5°	-5°	-6°	-6°	-10°	0°	1°	-5°	-4°	2°	3°	-1°	2°	3°	-1°	-6°	-7°	-3°	-1°	-6°
Precipitation	mm														2.6	8	3.7	1.1	0.1			0.9	0.1	0.8	0.8	0.3					0.4	0.4	0.4	0.3	0.3	0.4	0.2				0.2													0.2				3.0	6	8	2.8	0.1					7	2.9	0.3								6	5	0.4	4.5	7	0.5
New snow	cm																														<.1	<.1	0.2	0.3	0.2	0.3	0.2	<.1	<.1		<.1													<.1	<.1	<.1		2.6	5.6	7.7	2.6	<.1					6.9	2.8	0.2											<.1	4.5	0.3
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	<1	<1	<1	<1	<1	<1	<1	<1	<1	<1	<1	<1	<1	<1	1	1	1	1	<1	<1	<1	<1	<1	<1	2	6	11	12	11	11	10	9	9	14	15	15	15	15	13	12	12	12	9	9	7	6	3	5	6	6	5	5
Wind	m/s	0	1	1	0	1	1	1	1	2	2	3	3	4	3	2	3	1	1	1	1	1	1	1	2	2	4	4	1	2	4	4	3	3	5	5	4	4	4	4	3	3	2	2	1	1	1	1	1	2	2	1	0	1	2	2	1	4	7	6	4	2	1	1	0	1	3	4	3	1	1	1	0	1	1	1	2	2	2	6	4	2	1	0	1
Wind gusts	m/s	4	3	4	3	3	3	5	6	7	8	9	10	12	13	12	10	9	6	6	4	6	7	8	9	10	12	13	12	8	11	12	12	12	15	15	15	14	13	14	15	12	10	9	6	7	8	8	8	8	9	7	5	3	8	11	9	18	23	25	19	11	6	7	6	6	11	14	14	12	5	5	4	4	7	8	9	15	10	17	18	13	8	4	5
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