I've only been walking in this country, but I would suggest: make sure your boots are comfortable and broken in; take a lightweight breathable waterproof jacket (and possibly trousers) in case of rain, a light rucksack or backpack and some of that sun lotion that lasts all day! Hat, sunglasses but also take a light fleece or jumper because it could get colder up in the mountains. And insect repellant!
