When entering Haleakala National Park on Maui, this helpful sign provides visitors the first hint of what is to come. We passed through several layers of clouds on the way to the 10,023 foot summit. Although the crater was engulfed in clouds, we did have a magnificent view of the coast and the Big Island. Rental car companies warn you about taking their vehicles up this road and state that you must use low gear when descending. The mini-van in front of us on the way down used their brakes the entire way, we could smell the brake pads burning.