The Gastlosenexpress will take you up to an altitude of 1,540 metres, plunging you into the heart of the winter landscape with a view over the peaks that overlook the villages of Jaun and Im Fang. The trail starts by winding its way to the panoramic viewing area in the shadow of the Gratflue. It then slopes down gently for almost a kilometre to the toboggan run, and then follows the waymarked trail to the left.

The imposing presence of the Gastlosen chain will accompany you throughout the climb up to the Soldatenhaus. The steep limestone cliffs are also known as the «Swiss Dolomites». One of the mountains has a hole in it, called the «Grossmutterloch». According to legend, the devil himself was deeply angry at his grandmother and smashed her against the cliff. The hole is clearly visible from the trail. With a bit of luck, you will have the chance to witness a unique and spectacular light show. For almost half an hour, you will see the sun flashing through the hole at several points on the trail, from the Gross Rüggli to the Unter Sattel. But a number of conditions have to be met: you must be in the right place at the right time, and above all, you need good weather.

The trail then winds through the mixed forest and continues to slope up to the Alp Ober Sattel. The sun then continues its course to where the Soldatenhaus stands. Another magnificent view awaits snowshoe enthusiasts at the foot of the Gastlosen. The Klein Mungtal nestles at its feet. The descent leads down to the toboggan run or the Sommer Wanderweg from the Oberen to the Unteren Sattel. After the Buvette des Sattels, the trail winds through the wood to the village of Jaun.