Posted on Mar 1, 2024
0
NENE
Posted on Mar 1, 2024
0 0
NENE
6.5km

Distance

3 hours

Time

250m

Ascent

501m

Highest point

3.5/10
Difficulty
Snow Icon | Hokkaido Wilds
Jan-Mar

Best season

GPX

KML

TOPO

GSI

Within the Asahikawa City limits, Yunai-yama 湯内山 (501m) is a very easily accessed low peak perfect for multiple laps of cold, dry powder. Furthermore, the ridge extending north from the summit allows access to a huge acreage of terrain. This means that despite the peak's popularity among local backcountry skiers, there'll always be fresh snow to ski for those willing to walk just a little bit further along from the summit. The trailhead is only a 20 minute drive north from central Asahikawa City, so it should be on any skier's radar in the Asahikawa area, particularly when alpine areas are ruled out due to weather.

We visited this route on Feb 03, 2024

Skiers: TimbahTimGavin

Topomap

Route Map

Need to know details

Location

Yunai-yama is located about 20 minutes drive north of Asahikawa City central in central Hokkaido, just above the Yunai Tunnel 湯内トンネル on Route 98, the ‘back road’ heading west towards Fukagawa City. This route starts on the eastern (Asahikawa City) side of Yunai Tunnel, at a large plowed parking bay here.

General notes

As a quick-backcountry-laps mainstay for those in the Asahikawa City area, Yuna-yama is a great option for those keen for a quick morning or afternoon ski. There’s an incredibly large terrain to ski, however, so it’s easy to make a full day of lapping out of this very easy-to-access zone.

Hut
None
Route details

From the large plowed parking bay, head west on the northern side of the road, quickly climbing above and to the right of the tunnel entrance up a broad gully, through a small plantation forest. This gully very soon exits into beautiful old-growth forest, and a broad face at a perfect pitch for skiing. From here it’s only about a 50-minute skin up to the summit. The summit isn’t named on official topomaps, but there is a hand-carved summit sign displaying 湯内山.

From the summit, either lap the main face, or head north along the ridge for your pick of a plethora of untracked slopes to the east and west of the ridge.

Route Timing
Up | 1hrs
Down | 0.5hrs

The timing here assumes you just climb to the top of the 501m peak, and ski back down. Most skiers, however, will find they enjoy this area the most when they commit to a full day of lapping. If you head to the northern-most point on our map and lap at least four or five times, you’ll happily spend 5-6hrs making the most of the northeastern-aspect dry powder.

Transport

Public transport:

At a pinch, if you’re happy to walk 40 minutes or so from the bus stop to the trailhead, it would be possible to take a public bus from Asahikawa JR Station to the Honryuji Temple bus stop 本龍寺バス停, a 3km walk to the trailhead (route from bus stop to trailhead here). Note that it’s generally frowned upon to ski on roads in Japan.

By car:

From central Asahikawa City, the plowed parking bay (location) on Route 98 towards Yunai Tunnel is about a 20-minute drive north.

Physical maps
Official Topo Map: Yunai (湯内) – map no. NK-54-7-14-1

NOTE: The official 1/25000 topo map(s) above can be purchased for 350yen from Kinokuniya bookstore next to Sapporo Station or online (in Japanese).

Aspect
The main aspect skiers are exposed to on the descent and/or ascent is Northeast. Other aspects that may also be encountered while following the route outlined on this page include: North, East. Therefore, keep an eye on the weather forecast a few days ahead of your trip to monitor wind, snow, and temperature. Unfortunately there are no avalanche information services for recreational backcountry users in this immediate area (but see the JAN reports and Furano Avalanche Center for sporadic observations eslewhere in Hokkaido).

Snow and
route safety

If you’re just sticking to the main thoroughfare on this route (from the tunnel entrance to 501m and back again), there isn’t much to be concerned about. The slopes are mellow, there’s no complexity in the terrain, and the distances and climbs are short (hence the overall difficulty rating of 3.5/10). If dropping down any of the bowls and gullies from the ridge north of the 501m summit, however, you’ll be dealing with considerable terrain trap hazards, and lots of isolated instabilities, including glide cracks. At times of snowpack instability, avoid dropping too far down into the gullies.

Yunai-yama Difficulty Rating

Category

Grade

Points

Strenuousness

Vertical Gain

D

25

Time ascending

D

0

Technicality

Altitude

D

0

Hazards

C

6

Navigation

C

6

Totals

37/100

GRADES range from A (very difficult) to D (easy).  More details here. Rating rubric adapted from Hokkaido Yukiyama Guidebook 北海道雪山ガイド.

Weather forecast

Windy.com weather forecast for Yunai-yama
Onsen nearby

On your way back into Asahikawa City, you might want to check out the sprawling Asahikawa Takasagodai Manyonoyu Onsen 旭川高砂台 万葉の湯 (location, 1600yen). They have a large restaurant, and it’s also possible to stay overnight for an extra 1,400yen (sleeping on reclining chairs) or 3,500yen (for a room). Details here. For a cheaper onsen experience, you could try the Takasago Onsen 高砂温泉 (location, 850yen), with great views across Asahikawa City. They also have an attached restaurant and outdoor pools.

Extra Resources

See Yamanomakochan’s write-up (in Japanese) here.

Guide Options

If you’d like to ski this route and/or explore areas north of Sapporo together with a local certified guide, get in touch with either Wataru Nara or Yasuko Kikuchi. They’re both born-and-bred Sapporo-based JMGA-certified guides. They both cut their teeth on peaks including those in northern Hokkaido and have taken part in major international expeditions. In addition, see a full list of English-speaking Hokkaido Mountain Guides Association (HMGA) guides on the HMGA website here

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Yamano-Makochan's Video Report
Show Full Route Notes Close Route Notes

Route Trip Notes

“Powder laps until our legs fall off,” that was the brief for today.

It started off cold, with temperatures in the morning hovering just “warmer” than -20 Celcius. We were all ready to get moving fast when we set off at 7:30am. 

It didn’t take long to skin through the initial plantation-like stand of black pine, and break through to see the broad main slope below the summit. 

This main slope had some old ski tracks on it, but still looked good – we’d had about 15cm of new snow on top of the already deep winter powder snowpack.

We got to the top in under an hour, ripped skins, and had our first downhill lap on the slope we’d just skinned up.  It was sublime. Dry, cold, deep, and mostly untracked. There was no way in the world we were not going to do many more laps.

We were also keen to check out the northeast aspect slopes further down the ridgeline to the north of the summit. So we went for a 30-minute walk along the ridge, spending most of that time with gaping mouths at the endless lappable terrain. 

After walking 1km north along the ridge, we could resist no longer, and dropped down the northeast slopes for three laps.

After we’d had our fill of the northeast slope, we put our skins back on for the walk back along the ridge to the 501m Yunai-yama summit. The final blat down the main slope was as fun as the first time, and the return to the cars on the main road was a simple zoom along the mellow forest floor.

A sweet, easy-access location that I can see us coming back to again for sure.

Comments | Queries | Reports

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Yunai-yama Difficulty Rating

Category

Grade

Points

Strenuousness

Vertical Gain

D

25

Time ascending

D

0

Technicality

Altitude

D

0

Hazards

C

6

Navigation

C

6

Totals

37/100

GRADES range from A (very difficult) to D (easy). Hazards include exposure to avalanche and fall risk. More details here. Rating rubric adapted from Hokkaido Yukiyama Guidebook 北海道雪山ガイド.