Walking trails, treks and trail runs follow ancient footpaths, whose main points of interest are volcanism, the presence of water in the forms of lagoons, streams and waterfalls, flora and fauna, and cultural heritage; In the Azores, there is a network of approximately 70 mapped trails, all of great biogeological, historical and ethnographical interest. They are classified in accordance with their level of difficulty, distance and type of route (linear or circular).