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Japan › Yatsugatake

Day trip / approx. 10.2 km / High point 2,760m

Iodake from Sakuradaira

Sakuradaira → Iodake → Sakuradaira

From Sakuradaira (1,890 m) via Natsuzawa pass to Iodake (2,760 m) on the rim of an explosion crater, and back.

How hard is it?

Easy.
Walkable path

Stamina 3 / 10Walking 4h24

“A day trip is possible”

Technical B

Steep ups and downs; hiking experience needed

Typical
Day trip
Walking time
4h24walking only, no breaks
Distance
approx. 10.2 km
Total climb
approx. 940m high point Iodake 2,760m

Stamina and technical grades: Nagano Prefecture mountain grading, No.77 (our translation). HutsGo is still checking these against the table. See the table

How do I get there?

Public transport not confirmed.
Back to the same trailhead

  1. Sakuradaira 1,890m / Parking for about 150 cars
  2. Day trip, out and back
  3. Sakuradaira Back to the same trailhead

By car Free (about 150 cars). No bus; take a taxi from Chino Station.

Times, fares and parking →

When are the huts open?

Open today (10/23): 2 of 2 huts

2026 season dates, from each hut's official site and Nagano Prefecture's hut list (sources on each hut page).

When does booking open?

2 huts to stay at. Book with each hut (HutsGo takes no bookings).

Pick your huts and plan the days

Map and elevation

Elevation profile of Iodake from Sakuradaira. Horizontal axis is cumulative walking time, vertical axis is elevation.2,0002,500mSakuradaira (桜平) · 1,890m · 0 min from the start · TrailheadSakuradaira 1,890mNatsuzawa Kosen (夏沢鉱泉) · 2,060m · 0 min from the start · Hut (tap for details)Natsuzawa Kosen 2,060mOren-goya (オーレン小屋) · 2,330m · 0 min from the start · Hut (tap for details)Oren-goya 2,330mIodake (硫黄岳) · 2,760m · 0 min from the start · Point passedIodake 2,760mOren-goya (オーレン小屋) · 2,330m · 0 min from the startOren-goya 2,330mNatsuzawa Kosen (夏沢鉱泉) · 2,060m · 0 min from the startNatsuzawa Kosen 2,060mSakuradaira (桜平) · 1,890m · 0 min from the start · TrailheadSakuradaira 1,890m Elevation profile of Iodake from Sakuradaira. Horizontal axis is cumulative walking time, vertical axis is elevation.2,0002,500mSakuradaira (桜平) · 1,890m · 0 min from the start · TrailheadSakuradairaNatsuzawa Kosen (夏沢鉱泉) · 2,060m · 0 min from the start · Hut (tap for details)Natsuzawa KosenOren-goya (オーレン小屋) · 2,330m · 0 min from the start · Hut (tap for details)Oren-goyaIodake (硫黄岳) · 2,760m · 0 min from the start · Point passedIodakeOren-goya (オーレン小屋) · 2,330m · 0 min from the startOren-goyaNatsuzawa Kosen (夏沢鉱泉) · 2,060m · 0 min from the startNatsuzawa KosenSakuradaira (桜平) · 1,890m · 0 min from the start · TrailheadSakuradaira

High point 2,760m ／ Total ascent approx. 870m ／ 870m of climbing from Sakuradaira (1,890m)

Hut (tap for details) Trailhead Point passed Elevation not confirmed

The horizontal axis is the order of the route, not time: we have not confirmed this route's leg times against an official source. The ridge line simply joins the recorded points, so it does not show the real shape of the terrain. Total ascent is an approximation summed between those points.

The explosion crater of Iodake
The explosion crater of Iodake Photo: Chino City / CC BY 4.0（Wikimedia Commons）
Akadake from Iodake
Akadake from Iodake Photo: Σ64 / CC BY 3.0（Wikimedia Commons）
Shows whether each hut is open that day

Stop by stop

Section times split the prefecture's official total course time across sections by path length, climb and descent.

  1. 1,890m

    Sakuradaira (桜平)Trailhead

    Free (about 150 cars). No bus; take a taxi from Chino Station.

    About this trailhead
  2. approx. 35 min up 192m down 16m

  3. 2,060m

    Natsuzawa Kosen (夏沢鉱泉)Hot spring inn

    Open all year Secondary source (as of 2026-10-13)

    Prices not confirmed

    Facilities (toilet, water, charging, payment) not confirmed

    Book on the official site Call 0266-73-6673 Details and access Add to my plan
  4. approx. 40 min up 260m down 7m

  5. 2,330m

    Oren-goya (オーレン小屋)Mountain hut

    25 Apr – 1 Nov Secondary source (as of 2026-10-13)

    Prices not confirmed

    Facilities (toilet, water, charging, payment) not confirmed

    Book on the official site Call 0266-72-1279 Details and access Add to my plan
  6. approx. 2h up 458m down 464m via Iodake 2,760m

  7. 2,330m

    Oren-goya (オーレン小屋) again on the way back ↑ details

  8. approx. 40 min up 5m down 265m

  9. 2,060m

    Natsuzawa Kosen (夏沢鉱泉) again on the way back ↑ details

  10. approx. 30 min up 13m down 188m

  11. 1,890m

    Sakuradaira (桜平)Trailhead

    Free (about 150 cars). No bus; take a taxi from Chino Station.

    About this trailhead