Piyashiri-yama
ピヤシリ山44°26′ N 142°35′ Eintermediate+800 m989 m
Nayoro's local summit is a long, cold valley-and-ridge tour from the ski area to a free log hut at 966 m, close to the coldest corner of Hokkaido.
Photo Robert Thomson · Flickr · CC BY-SA 2.0 and others, credited in the gallery
Read the terrain
The route climbs a long, unmarked line up the Piyashiri River valley and a broad ridge to the snowed-in sightseeing road, and gentle road grades lead on to a log hut a few metres from the summit. The descent ridge threads trees and fallen trunks.
Watch for these hazards
- Strong wind and whiteout; visibility fell below 30 m on Hokkaido Wilds' trip
- Summit windchill around -25°C
- Snowmobiles use the sightseeing road
- No avalanche bulletin covers this area
- The summit hut can ice over and be hard to find in a whiteout
- A steep scramble onto the ridge at about 415 m and several river crossings
Pick a route that suits the dayルート
Piyashiri River valley and ridge to the summit hutピヤシリ山
800 m ascent · intermediate
The route goes up the valley from the ski area, over a steep scramble at about 415 m and along the ridge to the sightseeing road and the summit hut. About 17 km round trip, unmarked, with the descent down a treed ridge.
Follow the published lines in 3D立体地図
1 trip reports
What riders report from the hill山行記録
2017-03 · Hokkaido Wilds trip report
The route walks past the ski area buildings and follows the Piyashiri river to about 450 m, and any climbing line from there meets the snowbound sightseeing road to the hut. Snowmobiles use that road, and the author's report, published in March 2017, gives a windchill of -25°C at the summit.
Read the source
Piyashiri-yama stands above Nayoro within 30 km of the coldest place in Hokkaido, and in late January the air can fill with diamond dust. The tour starts at the Nayoro Piyashiri ski area and follows the Piyashiri River before climbing a steep bank onto a wide ridge. At about 750 m you reach the sightseeing road, buried for the winter, and follow its easy grade to the top.
The emergency hut beside the summit is open all year and costs nothing. It's drafty and has a small wood stove that needs about three hours before the room warms much, and the door may need digging out. Hokkaido Wilds recorded a whiteout under 30 m and windchill around minus 25 on its overnight, so carry a map and compass even on a short day. Nayoro Onsen Sunpillar sits across the road from the trailhead for the soak afterwards.
Quick answers about Piyashiri-yamaよくある質問
How long is a tour on Piyashiri-yama?
A typical tour on Piyashiri-yama climbs about 800 m and takes about 5 hours (3.5 up, 1.5 down); many parties overnight in the summit hut.
When can you ski tour Piyashiri-yama?
The touring season on Piyashiri-yama runs december to April.
Do you need a guide for Piyashiri-yama?
Experienced, equipped groups tour Piyashiri-yama on their own, though a local guide finds better snow.
Where do you check avalanche danger for Piyashiri-yama?
Read the day's bulletin from Japan Avalanche Network (https://nadare.jp/) before every tour on Piyashiri-yama.
Within 40 km
Ski resorts nearby山
Within 35 km
