Check out these sites to help you plan your hiking adventure in Corsica, including a blog post on my own hiking trip to Corsica
I found a guidebook invaluable when I traveled to Corsica and there are many to choose from covering all the varied hikes in Corsica, from the multi-day treks like the GR20 to day hikes across the whole island.
Guided tours in Corsica are a great way to experience this island. Leave the navigation and planning to someone else so you can enjoy the magnificent views.
Some great resources to help you plan your hiking trip to Corsica