The hike to the Hollywood sign is one of the more iconic walks in L.A. It’s a a gradual 6.5 miles of moderate, dog-friendly trails with a couple of fun detours and a photogenic payoff. activity At the top of Mount Hollywood, 360-degree views of everything from the Verdugo Mountains to the Pacific Ocean (on a rare, smog-free day) offer a bird’s-eye crash course on L.A. geography. Cardboard Box Backpackers…