Set out from the path behind the campsite toilets.
(S/E) From here, take the small paved path that climbs up in steps.
(1) Cross the dirt track and keep climbing up toward the mountains.
(2) From here, the climb becomes steeper and takes you over some scree. You can go around it a little to the right of the stream to stay on the rock more.
(3) You have reached the summit! You can admire Lochan Coire Lagan and the beautiful views of the sea. If you are feeling brave, you can even take a dip.
The return journey is back along the same path as on the way out. Be careful over the first 100m of descent (S/E).