The mountain hike around the Gelmersee provides fascinating insights into the high alpine mountains and the valley of the young Aare. Along the lake, original streams and huge rock slabs invite you to linger.At the beginning of the tour, you will first take the adventurous Gelmerbahn from Handeck up to the Gelmersee. Here you then start your lake tour in breathtaking mountain scenery. With the partially steep rocky areas, surefootedness and a head for heights help to enjoy the view down to the turquoise-blue lake.Our tip: If you do not want to return to the valley so early, then you can extend the tour with a climb and an overnight stay at the Gelmerhütte.Not far from the Gelmerbahn valley station you will find the cozy hotel and nature resort Handeck. The hotel, with its direct contact with the alpine pastures, is a perfect stay for families and nature lovers. Thanks to its ideal location, you can start several hikes from here. You can find out more about the Hotel Handeck at grimselwelt.ch/grimselhotels/hotel-handeck.The Gelmersee is part of one of the most complex hydropower systems in the Alps - the Oberhasli power plant. A total of 13 power plants, eight reservoirs, 160 kilometers of galleries and hundreds of kilometers of piping make Oberhasli a masterpiece of engineering. Interested parties can visit the facility throughout the year. Here you will find all the information: grimselwelt.ch/besuch-im-kraftwerk.