The starting point for the hike to Nidersee is Arnisee (UR). This can be reached by cable car either from Amsteg or from Intschi ( www.arnisee.ch ). It is best to follow one of the signposts in the direction of Leutschachhütte. It is open from mid-June to mid-October. The hut is also a perfect place to stay overnight. The hike starts easy and you can enjoy views over Arnisee. Soon it will get steeper but still it's a fascinating hike along the little river in between flower fields and grazing cows. After about 1:40 hrs you'll reach a very steep ascent and that was very demanding since it was super hot. However, you'll be rewarded with a fantastic view on Nidersee as soon as you reach the top, where you also can jump into the lake or at least refresh for a bit. Another 10-15 min and you'll reach Leutschachhütte.