If you have a mountain bike, you can mix and match roads and trails on the 100km round trip between L'Escala and Cadaqués - a charismatic and picturesque seaside town nestling below the hills north of the Bay of Roses. For the challenging stretch between Roses and Cadaqués, you can take the mountain road (GI-614), which carries a fair bit of traffic, or a rocky trail closer to the coast. Both routes through the Cap de Creus Natural park are very scenic, but the latter (marked as cycle route 12 on the local leisure map) has the edge when it comes to broad vistas and you don't have to worry about cars. As the trail is tough and long - it goes up hill and down dale - it is probably best to only take it in one direction, particularly in the heat of summer. In any case, make sure you refuel properly, while enjoying the cobbled streets and handsome white-washed buildings of Cadaqués. 8/10
More cycle routes in Catalonia can be found here.