When the beach mornings start to blur together, drive up into the hills above Alferce and walk the Barranco do Demo boardwalk instead. Wooden passadiço planks carry you through a steep, shaded valley in the Monchique mountains, past cork oaks and a stream that keeps running even when the coast is bone dry. It’s a proper change of scenery, not just a stretch of the legs.
You’ll need a car – the coast resorts are a real climb away – so treat this as a relaxed half-day rather than a quick detour. Walk Algarve and We Travel Portugal both map the route and current conditions, and Komoot marks the highlight at these coordinates too. Wear closed shoes for the steps and uneven boards, and don’t assume the gorge stays cool all afternoon – it can get surprisingly warm once the sun is overhead.
Good for active couples and families with school-age kids based in Portimão, Lagos, or Albufeira who want a mountain morning between beach days. Skip it if anyone needs step-free access, or your only free time is a beach morning with no car booked. Add a Monchique village lunch afterwards rather than racing back for a 14:00 pool slot.
More: top things to do in Monchique, where to stay in Monchique.