You can walk almost anywhere. However parts of the lakeside road can be dangerous as there are no continuous paths and at some points, no grass verge to move onto. Take care when walking along the roadside.
During the summer months ensure that you take a small rucksack or bag with you with a few bottles of water and snacks if you intend on walking far. Alternatively if you are walking through any of the villages you should be able to get a refil at one of the taps in the villages.
Wear the correct clothing and comfortable shoes for walking in. Sandals are probably the best in order to avoid getting blisters. Remember to take your sunscreen with you.