This 5 days trek was made in October to take advantage of low temperatures. It's a comfortable and easy trek, overnight in small and charming hotels (no sleeping bag, no mountain huts), limited altitude differences, well marked path at low altitude.
Very well known trek with plenty of descriptions available, here you will find only a few pictures to give an idea of the landscape.
Departing from Collioure, the path climbs into dry mountainous landscapes.
The path stops at Port Bou and goes to Selva.

The path to Rosas is very winding because it follows the coast, although distances look small in terms of km, it does represent quite a few hours of walk.

Beach along the path to Rosas.

Arriving at Cadaquès though olive trees.