There are many books, maps and apps among the many hiking trails. Guided day tours are offered such as in the Canadas of Tenerife or by Rhenish vineyards, accompanied hikes in Tuscany or in Sardinia, as well as mountain tours, which usually require a local guide.
Hiking groups are very sociable, and appetizing coastal tours in Catalonia and Sicily usually end with wine and local treats in country inns and restaurants.