Before hiking the Dolomites in 2026, the most critical thing to understand is that mountain weather is highly unpredictable; it can be 25°C in the valley and snowing at the peaks within the same afternoon. You must dress in layers and always carry high-SPF sun protection, as the UV rays are significantly more intense at high altitudes. Overtourism has become a major issue at iconic spots like Lago di Braies and Tre Cime di Lavaredo, so many trailheads now require advanced parking reservations or the use of mandatory shuttle buses. Additionally, while many rifugios (mountain huts) are high-tech, many still require cash (Euros) for small purchases and overnight stays, and they often book up six to twelve months in advance. Finally, ensure you have travel insurance that specifically covers helicopter evacuation, as standard medical plans often exclude high-altitude rescue, which is the only way off the mountain in a serious emergency.