Haleakala's summit looks out over a vast volcanic landscape of cinder cones, colored slopes and clouds moving through the crater. You can take in the view from overlooks near the summit or follow the Sliding Sands Trail for a closer look at the terrain. Even a short walk feels different at this elevation, with little shade and a slower climb back uphill.
Bring warm layers for the cold and wind. Entry to the Summit District between 3am and 7am requires an advance sunrise reservation, separate from the park entrance fee; you can also visit later in the day.