Chaiserstuel, Mountain summit in Nidwalden, Switzerland

Chaiserstuel is a mountain peak located on the border between Nidwalden and Uri in central Switzerland. The summit stands at approximately 2400 meters and marks the cantonal boundary between these two regions.

Chaiserstuel lies on the cantonal border between Nidwalden and Uri, a boundary fixed by the two cantons and shown on the Landeskarte sheets 1191 Engelberg and 245 T Stans. The summit can be climbed from both cantons, with approaches from Bannalp and Oberrickenbach in Nidwalden and from Gitschenen and Isenthal in Uri.

The name Chaiserstuel, also written Chäiserstuel, is the local form used for this 2400 m summit on the Nidwalden–Uri border. Hikers on the Oberalper Grat ridge toward the Bärenstock pass a large hole in the rock known as the «Tor», a landmark along the route.

The summit lies on the Nidwalden–Uri border and can be climbed from both cantons. Approach routes start from Bannalp and Oberrickenbach in Nidwalden, and from Gitschenen and Isenthal in Uri, where mountain lodgings are available. The 1:25,000 Landeskarte sheet 1191 Engelberg covers the area.

Northeast of the summit, the Oberalper Grat ridge runs toward the Bärenstock; roughly halfway along it lies a large hole in the rock known as the "Tor", a detail hikers often pass without noticing.