室堂から雄山へ。残雪と露出岩稜が混在するルート

Tateyama (Mt. Oyama) started the day mostly clear with a summit temperature of 5.3℃, feeling like 3℃. There is a 4.1℃ difference compared to the Murodo base. Temperatures are expected to rise to 9.1℃ by noon, but remember this is a 3000m class mountain. Winds will remain light throughout the day, but with 84% humidity, it can feel cold during stops.

Snow depth is 107cm. The route from Murodo to Ichinokoshi and the summit of Oyama will feature a mix of remaining snow and exposed rock ridges. Expect wet sections and muddy areas, especially on sun-exposed slopes and rocky sections where snowmelt is active. Carrying chain spikes is recommended for traction on snowfields, though full crampons may not be necessary.

For layering, wear a fast-drying base layer, a light fleece, and a windproof/waterproof shell as an outer layer. An additional warm layer is essential for breaks or unexpected weather changes. At 3000m, even a slight drop in temperature or wind can increase the risk of hypothermia. Visibility is currently 1.4km, which is somewhat limited, and could worsen if clouds move in. While partly cloudy in the afternoon, no precipitation is expected.

Temperatures will drop to around 4℃ overnight. Ensure adequate cold weather gear and preparation even for a day trip.