| Chastelhorn | |
| Elevation M: | 2973 |
| Prominence M: | 246 |
| Prominence Ref: | [1] |
| Map: | Switzerland |
| Location: | Uri, Switzerland |
| Range: | Lepontine Alps |
| Coordinates: | 46.595°N 8.598°W |
The Chastelhorn is a 2,973 metres high mountain in the Lepontine Alps, overlooking Hospental in the canton of Uri. The northern flanks are covered by a glacier named St. Annafirn and a small lake (2,624 metres) lies south of the summit.
The massif of the Chastelhorn consists of several summits including the Gemsstock (2,961 metres) which is connected to Andermatt by a cable car.