Hokkaido Mountain Passes

Northern HokkaidoRoute 38Preventive closure section

Sannoyama Passabout 479 m

Minamifurano Town and Furano City, Hokkaido ・ 三の山峠（さんのやまとうげ）

Around Sannoyama Pass3D view built from GSI elevation data and recent aerial imagery. The orange line is Route 38. Use the buttons at top left to view from the north, east, south or west, or drag to rotate. On phones, move two fingers up or down to tilt, and pinch to zoom.

Loading the terrain

GSI Tiles (elevation tiles, seamless aerial photos), processed by this site. Road lines: © OpenStreetMap contributors.

Check if the road is open

Closures and road conditions change by the hour. Check official road information before you set off. These sites are in Japanese; your browser's translation feature helps.

Sannoyama Pass is in a "preventive closure section": when exceptionally heavy snow or a blizzard is forecast, the national government closes the road in advance. The section is 6.3 km long (MLIT list, in Japanese).

Pass data

Elevation
about 479 m#18 of 31 by heightHighest point of the road near the pass (excluding tunnels and bridges) in GSI elevation tiles (10 m mesh).
Road
National Route 38
Location
Minamifurano Town and Furano City, HokkaidoMunicipalities of the pass and within 300 m of it (GSI reverse geocoder).
Preventive closure in heavy snow
Yes (6.3 km section)

GSI Maps has no label for this pass, so it is placed at the highest point of the road within the preventive closure section. Checked: 2026-11-03

Open in GSI Maps

This page is not a driving guide. In winter, weather and road surfaces on mountain passes change quickly. Check the latest road and weather information, and do not push on in bad conditions.

Weather at Sannoyama Pass

Sunrise and sunset

SUNRISE--:--
SUNSET--:--

Today's times (Japan time) calculated for the pass's latitude and longitude against a sea-level horizon. Surrounded by mountains, the pass gets sunlight later and loses it earlier than these times.

Japan Meteorological Agency pages

Nearby passes

Nearby roadside stations

Nearby mountains

Straight-line distances from the pass.