
1) Bernese Alps 2) Mountain in Switzerland 3) Mountain of Valais 4) Two-thousander of Switzerland
Found on
https://www.crosswordclues.com/clue/sidelhorn

The Sidelhorn is a mountain of the Bernese Alps, located west of the Grimsel Pass, on the Bern-Valais border. It lies at the eastern end of the chain between the Unteraar Glacier and the Rhone valley, named Aargrat. The summit can be reached by several trails from the Grimsel Pass. ...
Found on
http://en.wikipedia.org/wiki/Sidelhorn
No exact match found.