Ice patches frequently remain on the switch-backs above Trail Camp all summer long. Night temperatures often drop to freezing or below even in summer. Afternoon thunderstorms are common. Ice axe and crampons are usually needed in spring and early summer. Carry water to the summit as there is no dependable source of water.
Giardiasis is a serious problem.
Boil or filter all drinking water. Campgrounds at Whitney Portal are usually open approx. May 15 - Oct.15. Cellular pay telephone. Backpackers must park in paved overnight areas.