自然保護部, 自主山行

2026/10/3-4湯の丸山・根子岳・四阿山テント泊『ディナーはパエリアとアヒージョ🍻』

【山行情報】
山域：上信越
山名：湯の丸山（2101ｍ）根子岳（2207ｍ）四阿山（2354ｍ）
参加者：自然保護部員8名
目的：自然保護部テント泊・自主山行
　　　自然保護部員の親睦と自然保護の大切さの共有（今回も背負わないテント泊）

【行程】
＜1日目：10/3(土)：湯の丸山＞
湯の丸高原P～地蔵峠登山口～湯の丸山南峰～湯の丸山北峰～湯の丸山南峰～湯の丸山・烏帽子岳鞍部～湯の丸キャンプ場～湯の丸高原P～TSURUYA～菅平高原ファミリーキャンプ場ーテント設営

＜2日目：10/4(日)：根子岳・四阿山＞
菅平キャンプ場ーテント撤収～菅平牧場登山口P～登山口～根子岳～四阿山～中四阿～小四阿～四阿山登山口～菅平牧場登山口P

Topographic map showing hiking routes and landmarks near Yu-no-Maru Mountain, including paths and elevation markers.
Topographic map showing hiking trails and elevation points for the area around Mount Yatsugadake.

【山行状況】
＜1日目：晴れ＞
出発は5:00、3時間程で湯の丸高原Pに到着、真っ青な空に気持ちの良い秋晴れです。まず湯の丸スキー場の急登を登ります。「リフトに乗りたいなー」と動いていないリフトを恨めしそうに眺めながら登りました。でも振り返ると絶景です♪


スキー場を登り切って湯の丸山が見えてくると、岩が多い急登になります。途中振り返って富士山が見えた時には大きな歓声があがりました。登山道の木々も色付いています。イワインチンも咲いていました。

Group of hikers looking at a mountainous landscape with trees and clear sky.
「富士山！」皆一斉に振り返ります（中ほどの雲の中に見えました）
Hikers ascending a rocky trail surrounded by greenery on a sunny day.
A hiker climbing a rocky path surrounded by trees with varying autumn colors under a bright blue sky.
A cluster of bright yellow wildflowers surrounded by green foliage and dry grass.
イワインチン

湯の丸山山頂は広々としています。そして360度の大パノラマです。

A group of hikers ascending a rocky trail through lush green hills under a clear blue sky.
A group of five hikers standing on a rocky mountain top, wearing backpacks and discussing the view with a clear blue sky in the background.

富士山～北アルプス～頚城三山～立山連峰～後立山連峰まで一望です。明日登る根子岳・四阿山がドーンと！

Panoramic view from a mountain peak showing rolling hills, lush green forests, and a clear blue sky with clouds in the distance.
A panoramic view from a mountain summit, featuring rocky terrain, a clear blue sky, and distant mountain ranges. Two hikers can be seen on the summit.


湯の丸山北峰へも足を延ばしました。こちらも360度の大パノラマです。

A group of six hikers poses on rocky terrain under a clear blue sky, with one person standing atop a rock with arms raised in celebration.
A group of hikers posing triumphantly on a rocky mountain summit under a clear blue sky, with one person holding up a sign.


下山は湯の丸山から烏帽子岳を眺めながら湯の丸山・烏帽子岳鞍部へ降りて湯の丸キャンプ場へ回りました。カラマツの黄葉が始まってきていてとても気持ちよく歩きました。


下山後キャンプ場に向かう途中皆で食材の買い出しです。今年もブドウは外せませんね。

Two individuals shopping in a supermarket produce section, examining packaged fruits.
A group of four people standing outside cars in a parking lot, with one person holding a bag of drinks and another holding a red tote bag.


菅平高原ファミリーキャンプ場に到着.。広々としたキャンプ場に私達だけで貸し切りです(この土日が営業最終)。それぞれテントを設営して、皆で夕食の準備です。

A camping area with several brightly colored tents set up on green grass, surrounded by trees and mountains in the background. People are seen engaging in various activities, including unpacking and organizing.
A variety of fresh groceries displayed on a wooden table, including vegetables, fruits, seafood, meats, and condiments. Items include lettuce, tomatoes, cucumbers, lemons, peppers, pasta, bread, and packaged foods.
Two individuals washing fresh vegetables at a communal sink outdoors, surrounded by greenery.
Two women sitting at a table outdoors, cooking food in pots over a portable stove, with fresh vegetables and plates of food nearby.


パエリアとアヒージョに野菜サラダの夕食の完成です。デザートはクイーンルージュとシャインマスカット！とっても美味しい夕食でした。

A large dish of vibrant yellow rice with vegetables, topped with lemon slices and served alongside a bowl of mixed salad with cherry tomatoes and cucumber.
A plate with a cluster of purple grapes on the left and a plate with a cluster of green grapes on the right, illuminated by a warm light.
A group of six people gathered around a wooden table at night, enjoying a meal with illuminated lanterns and dishes of food. They are smiling and engaging with each other in a cozy outdoor setting.


夕食後飯盒で炊いたご飯で明日のお昼用におにぎり作り。施設のお風呂に入って就寝。

Four individuals preparing food at a table in a dimly lit outdoor setting, with one person holding a light source.
A plate with several rice balls wrapped in plastic film, placed on a dark wooden surface.


＜2日目：曇りのち晴れのち曇り一時小雨＞
明るくなり始めたら活動開始。朝焼けを見ながら朝食準備。野菜たっぷり卵スープとオープンサンドで朝食です。

A campsite at dusk featuring several brightly colored tents in various shades of green and yellow. A person is illuminated by a light, standing near the tents against a backdrop of mountains and a twilight sky.
A campsite at dusk with several tents and a colorful sky featuring purple and pink hues, framed by trees and a mountain in the background.
A person using chopsticks to stir a hot pot with vegetables and broth, while another hand pours a liquid ingredient into the pot. Surrounding items include condiments, lettuce, and a sandwich on the table.
A group of six people enjoying a meal outdoors at a picnic table, with various dishes including soup, sandwiches, and vegetables. The setting appears to be under a shelter surrounded by nature.


テントを撤収して菅平牧場登山口駐車場に向かいます。さすが人気の山第一駐車場はいっぱいでした。登り始めはガスが多く遠くの山は見えませんでしたが、高度を上がるにつれて見えてきました。北アルプスが一望です。

A foggy landscape featuring a red barn, green pasture, and grazing cows, framed by a wooden fence.
A group of hikers ascends a rocky path surrounded by lush greenery, with panoramic mountain views and clouds in the distance.

木々の実りや花々を愛でながら登りました。

Close-up of green leaves and three white berries growing among ferns and dried plant matter.
シラタマノキ
Close-up of blueberry bush with ripe blueberries and colorful leaves in autumn.
クロウスゴ
Close-up of green leaves and red berries growing amidst brown and green foliage on the ground.
コケモモ
A delicate white flower blooms among green and reddish leaves on the forest floor, surrounded by dried foliage and small rocks.
ウメバチソウ
Close-up of three purple flowers with intricate petals against a blurred green background.
マツムシソウ
Close-up of a purple flower bud surrounded by small gray stones.
オヤマリンドウ

根子岳で一休み


岩場を安全にでも楽しみながら進み、有名なぬかるみも木の根っこの急登も木道の階段も登って四阿山に到着。

Three hikers standing triumphantly on a rocky outcrop under a sky filled with textured clouds.
A group of hikers ascending a steep, root-covered trail in a forested area, surrounded by lush green foliage.
A group of six hikers standing on a wooden staircase on a mountain trail, surrounded by greenery and rocky terrain.
A wooden signpost at the summit of a mountain, displaying elevation markers in Chinese characters, surrounded by rocky terrain and sparse vegetation under a cloudy sky.
Group of seven hikers at the summit of a mountain, standing near a sign indicating the peak's elevation, with rocky terrain and cloudy sky in the background.


山頂からの雲海の中に浮かぶ浅間山！

A panoramic view of a cloud-covered landscape with mountains in the distance under a cloudy sky.


下山は中四阿、小四阿、四阿山登山口へ回って菅平牧場駐車場へ、牧場手前から小雨が降り出しましたが無事駐車場に到着しました。

A group of black and white dairy cows grazing in a grassy field surrounded by trees, with a wooden fence in the foreground.


【感想】
・湯の丸山は登りやすく山頂の360度の大パノラマに感激した。
・皆での買い物が楽しかった。男性陣が見つけてくれた食材(冷凍のアヒージョのセットやホタテの卵)で夕食が豪華になった。
・キャンプ場は広々としていて綺麗で快適だった。
・炊事場はお湯も出て良かったがテーブルに明かりの設備が欲しかった。
・共同食3食、コスパ最高。
・根子岳・四阿山は前評判よりぬかるみが少なく、快適に登れた。景色も良かった。