5 hiking trails through olive groves in Trás-os-Montes and Alto Douro, picked for summer: shade, rivers, and views over the UNESCO Douro. Distances, difficulty, heat tips.

The Montesinho Natural Park will receive €6.1 million for 13 sustainable tourism projects, hiking trails, wildlife conservation, and interpretive centers. Find out what will change and why it's worth planning your visit now.