残雪期白馬はBC天国
大型連休前半の白馬連峰北部山域に行ってきました。イグルー達人のイグルスキーでも、失敗イグルーで寝不足になりました。過剰な自信で攻め攻めの姿勢で最前線を歩いているので、参考にしてくださいね。
栂池からのルート、途中ロープウエイでは「センセイ！」と呼ばれました。一昨年のイグルー講習にきてくれていたBCさんで、きょうは蓮華温泉に下って周辺の滑降をする予定とか。その後イグルーも挑戦してくれていてうれしい限り。
栂池湿地平原から「船越の頭」に登って、小蓮華岳の南西の・2719の風下側に吹き溜まりの雪があったので、そこでイグルーをつくりました。きけば三国境周辺は風が強くて有名だそうで、あと30分歩いた先ならもう少し弱かったのにと今は思うけど、稜線は結構ガレが多くて、雪質としてはマシな感じに見えたので決めました。
掘り下げ1段で十分ブロックが取れたので壁2段積んだ上は、もうスキーを載せて塞ぎ始める I got plenty of blocks with just one layer of digging, so after stacking up two layers for the wall, I went ahead and started capping it with my skis
スキー板で屋根をすばやく作る
緩い傾斜地で斜面上方向に向かってブロックを切り出して進めていくと、下方向では30センチくらいの深さだったのが自動的に1メートルくらいの壁になり、風上側が安心の壁になります。それはいいのだけど結構疲れていたので、下に一段しかブロックを取らず、下2段目に進む元気が出なかった。なのでちょっと低い天井だけど、スキー板を載せて無理やり屋根ブロックを載せました。前回この方法ですぐ作れたのでまたやりました。
風上を壁にできて吹き込みは無かったが、張りの不十分な張り綱が風でバタバタして猛烈にうるさかった The wall on the windward side kept the draft out just fine, but the guy lines weren’t tight enough, and they flapped like crazy in the wind—it was insanely noisy
タープをかけて隙間風を防いだけど、うるさかった
隙間を塞ぐのが面倒で、上からタープを被せ、4隅をピッケルやアイゼンを埋めて固定。風上側は裾の上にブロックを固めて載せておきました。早々に中へ入り込む。風が強くてタープがバッタンバッタンとオールナイトでうるさかったです。イグルーの強みはテントと違って静かなこと。防音性の強い雪の壁を通してもうるさい。張り綱を締めたつもりでしたが、朝見たら、甘かった風下側がちぎれてしまっていた。
あれだけ風が強いのならツエルトにしろタープにしろ、外ではなく内側に張って、強風による吸い着き効果でやればよかったです(過去記事)。疲れて頭が回らなかったなあ。
それでも眺めは最高の場所でした。朝日を浴びる白馬連峰を窓から眺めることも出来ました。
やっぱりイグルーの強みは展望の良いところで泊まれること あんなうるさい風、テントだったら発狂クラスだ What I love about igloos is that you can sleep in places with killer views. That wind was so loud—if I’d been in a tent, I seriously would’ve lost my mind.
Failed Igloo Series in the Lingering Snow Season ① Flapping Tarp in the Wind
Hakuba in the Snowmelt Season – Backcountry Heaven
I headed out to the northern part of the Hakuba range during the first half of Golden Week.
Even as a seasoned igloo builder—Igluski style—I ended up getting barely any sleep thanks to a failed igloo.
I tend to charge ahead with too much confidence, always pushing the limits, so… yeah, learn from my mistakes!
On the ropeway up from Tsugaike, someone suddenly called out, “Sensei!”
It was BC-san, who came to my igloo workshop two years ago.
They were planning to ski down toward Renge Onsen and explore the area today.
I was super happy to hear they’ve been trying out igloos on their own since then!
From the Tsugaike marshland, I climbed up to Funakoshi-no-Kashira.
There was a nice drift of snow on the leeward side of Point 2719, just southwest of Mt. Kogarasu, so I decided to build there.
Turns out the area around Mikuni-sakai is famous for being super windy.
Looking back, if I’d walked another 30 minutes, I probably could’ve found a calmer spot…
But the ridge ahead looked pretty rocky, and the snow here looked decent, so I went for it.
Fast Roof Build with Skis
It was a gentle slope, so I started cutting blocks upward along the slope.
At the bottom, the snow was only about 30 cm deep, but as I dug higher, it naturally turned into a 1-meter wall—
a solid windbreak on the upwind side.
That part was great, but honestly, I was exhausted.
I only managed one row of blocks at the base and couldn’t bring myself to do a second.
So yeah, the ceiling was a bit low…
but I slapped on my skis and forced the roof blocks into place—same quick trick I used last time.
Tarp On Top = No Drafts, But So Noisy
I didn’t feel like stuffing all the gaps with snow, so I just threw a tarp over the top,
anchoring the four corners with an ice axe and crampons.
On the windward side, I piled snow blocks on the tarp edge to keep it down.
Crawled in early, hoping for some rest…
But nope. The wind was crazy, and the tarp kept flapping loudly all night long.
One thing I love about igloos is how peaceful they are compared to tents.
But even with snow’s soundproofing, it was still loud.
I thought I’d tightened the guy lines well, but in the morning, I found the leeward side had ripped—
I hadn’t pulled it tight enough.
With wind like that, I should’ve pitched the tarp (or even a bivy) inside the igloo instead of outside,
using the suction effect from the wind pressure to keep it in place.
(Like I wrote about in a previous post.)
But man, I was too wiped out to think straight.
Still, the view made it all worth it.
I got to watch the Hakuba peaks glowing in the morning sun, right through my little igloo window.
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