Park at the Sougia car park and head west from there. In the height of summer, don't forget your hats and water bottles, which are essential.
The path is well marked. The climb takes about 45 minutes. Then you walk across a plateau and descend towards Lissos.
To return to Sougia, you can wait for a small boat that runs a regular shuttle service. Alternatively, you can turn back (the hike can take up to 3 hours in total).