Beautiful glacial lake at the Klausen Pass - the starting point is the top of the Klausen Pass. There you can park for free, but you should not be too late, because especially on weekends the parking spaces are gone quickly. The pass summit at the Klausenpass is located at about 1950m above sea level, which means that you should rather bring a warm jacket. Follow the signs in the direction of "Gletscherseeli". You can find the lake under the name "Griesslisee". The way to the lake is easy, there are practically no other paths. Therefore you can not get lost. It's a moderate hike of 5.3km, 277 elevation gain, circular, around 1h54min to complete.