In reply to Will Hunt:
Its been a bit wet and miserable for the last few weeks, but it should dry out by the time you get there.
Might want to start at "Quebrantaherraduras" easy to get to and quite vertical climbing, at the beginning of the park. Above Manzanares, you've got "El deposito" a newer and well bolted intoduction to the area, then "El Reloj" for some harder, well bolted vertical climbing too.
"Cancho de los brezos" to try out your slab climbing technique
You should then tick off the classics on El Yelmo, scary multi pitch slab climbing like "Caballo Blanco"
El Pajaro,"Sur Classica" a classic naturally protected multi pitch (an awesome day out)
If you are feeling brave after that "Fulgencio" on El Hueso which has to be the scariest HVS offwidth crack in the area
For a long approach "Lucas" on the crocodillo is another but shorter classic