HI - What sort of length of walk are you looking for ?

The GR7 can be picked up at Tosca for walking towards Caro, you could also try parking at Font Nova and attempting the walk up the Mola de Alfara.

You could also park at the Hunting Lodge at Barranc de Caramella and walk to the pools and waterfalls and beyond.

There are a selection of books with walks around the park available at the El Cid book store in Ferreries.

Hope this helps.