You obviously know yourself and what you need on a walk better than anyone else. You may also need items based on the length and difficulty of the walk/hike. Here are some recommedations to help make your Competa trail experience as pleasent as possible.

~Water
~Good strong/supportive yet comfortable shoes
~Comfortable clothing and possibly some layers in case of temperature changes in the mountains
~Long trousers to cover and protect legs from minor scratches
~Sunscreen
~Hat/sunglasses
~Food/snacks depending on length of walk
~First-aid kit in case of cuts or bruising from rocks or bushes
~Cell phone in case of emergency or for assistence in directions
~Camera
~Some extra cash in case your taste buds kick in
~Good attitude and a smile!