If you're at the upper entrance the farest place you can go by car is at a farmhouse where you have to park.
Parking there you, of course, should drink something.
You'll either be attend by the señora or her twp daughters (depending on the weekday of course).
Order a coffee or some Aguadepanela before hiking up and receive the drink at your return.
If you're kind she may offer you someting of her homemade cheese. Delicious!