By the old post towns of Yose, Yoshino and Sekino along the Sagami river valley to Uenohara on its terrace: 10.1 km, +239 m.
Best season: Spring and autumn; the Sasago pass road closes in winter. No body manages the old road or publishes a walking season: the month table below is from climate normals. Most of the road is on town streets and main roads; in winter the Sasago pass holds snow and its road is closed to traffic. Before you go
Sagamiko to Uenohara
Loading topographic map…
Flat (<5%) Gentle (5–10%)
Green: Sagamiko to Uenohara. Grey: full trail. Elevation follows this mapped track.
Facts read from the guide's sources and OpenStreetMap on 29 September 2026. A page can change after we read it, so confirm with your accommodation before you rely on a date or a bed.
Stage start
Sagamiko
Town
Sagamiko (相模湖) station on the JR Chūō Line, over the Kobotoke pass from Takao. Two small inns are mapped nearby; Hachiōji, back down the line, has more.
OpenStreetMap lists at least 2 places to stay within about 1000 m (read 29 September 2026). TrailSplits has not checked which are open.
Stage end · overnight
Uenohara
Town
Uenohara (上野原), an old post town on its terrace above the Katsura river; the JR Chūō Line station is about 700 m below the road, not counted in the day's distance. One hotel is mapped nearby.
OpenStreetMap lists at least 2 places to stay within about 1000 m (read 29 September 2026). TrailSplits has not checked which are open.
Walking time for this leg
No walking time is published for this leg. Our estimate for the stage is 2 h 34, computed from the mapped line and its climbing.
Make it your trip
Walk by day, sleep in the towns
Every day ends at or near a railway station, but from Saruhashi to Fujimi most of them have no place to stay nearby: base yourself in Ōtsuki for the passes, in Kōfu for the basin, and in Kobuchizawa or Kami-Suwa for the last days, and ride the JR Chūō Line to and from each day's ends. In Tokyo, Fuchū and Hachiōji have hotels by their stations.
Typical weather on this stage, around 181–301 m. Select a month to see why it is rated as it is.
Monthly climate averages and daylight
Month
Weather
Mixed
Mixed
Good
Good
Good
Good
Mixed
Poor
Mixed
Mixed
Good
Mixed
Day / night
9°/-1°
9°/0°
12°/3°
17°/7°
21°/12°
24°/16°
28°/20°
29°/21°
25°/18°
20°/12°
15°/6°
11°/1°
Rain, mm
46
51
89
106
132
174
155
175
196
207
70
50
Snow at high point
Possible
Possible
–
–
–
–
–
–
–
–
–
Possible
Daylight
10 h
10 h 53
11 h 54
13 h 03
14 h 01
14 h 33
14 h 22
13 h 33
12 h 27
11 h 21
10 h 19
9 h 46
Source: TerraClimate 1991–2020 monthly averages. Averages for the area at each point’s elevation (4 km grid, corrected for height). Not a forecast or a report of current trail conditions. Snow at the high point is estimated with a simple snowpack model from these temperatures and precipitation, not observed; steep islands and high summits can hold more snow than it shows. Daylight is for the 15th of each month. Hut, transport and park seasons are separate: check them for your dates.
Before you go
Prepare for the Kōshū Kaidō
Arrange your stays, food and travel first, then check conditions again near departure.
Streets and main roads
Most of the road is urban or follows main roads with traffic: keep to the pavements, and where a road has none, walk facing the traffic. Through Hachiōji the old road is the national highway.
Black bears live in the mountains along the road: Hachiōji city lists its western mountains, where the Kobotoke pass is, as bear habitat, and Hokuto city recorded a bear 1.3 km from Hinoharu station on 9 September 2026, with sightings from late June to late November. On the pass and hill days carry a bell or radio, walk in company where you can, stay off the paths at dawn, dusk and after dark, and check the cities' sighting pages before you go.
Most of the road is asphalt with little shade, and the Kōfu basin (days 9 to 11) is among the hottest places in Japan in July and August. In summer start at first light, carry more water than you think, and rest through midday.
The Kobotoke pass (day 4, 548 m) and the Sasago pass (day 8, 1,096 m) are mountain paths and old roads, with no shops between the stations. The prefectural road over the Sasago pass closes every winter to walkers as well as cars (in 2025/26 from 15 December to mid-April): in that season take the train from Sasago to Kai-Yamato.
The JR Chūō Line follows the road from Hachiōji to Shimosuwa, and the Keiō Line in the Tokyo suburbs: every day of this guide ends at or within about 1 km of one of their stations. At the smaller mountain stations, check the timetable before you set out.
Prepare every day while you still have a connection, and test it offline before you set out.
Keep your route and maps on your phone for places without a signal. For multi-day trips, prepare them in the installed TrailSplits app.
Open this trail in the app.Install TrailSplits, then open this trail there. On iPhone, downloads in a browser may not be available in the installed app.
Choose your route or stages. Choose Prepare offline above. Wait for the route and maps to finish downloading.
Try it before leaving coverage. Switch offline, close and reopen the app, then use My Hikes to start navigation. Repeat for every part you will need.
Saving a bookmark is not a map download. Storage can be cleared by your device; keep a backup map for remote trips.
Route & sources
About this map
The line is the old road as mapped on OpenStreetMap (relation 9561988, 甲州道中, planet of 27 September 2026), 215.9 km from Nihonbashi to Shimosuwa, mostly on town streets and main roads; through Hachiōji the old road is the main road, walked on its pavements. The days end at railway stations on or near the road, most in its old post towns: TrailSplits chose them, not an authority, and the walking times are our estimates.
Official guidance and mapped-source comparison checked 29 September 2026. Map data is a route reference, not confirmation of today's path, weather or accommodation availability.