Because of the extreme elevation range in the parks, weather varies greatly from area to area, and mountain weather can change quickly. Opening and closing dates for facilities and services may change due to weather or other circumstances. There are five main areas of these parks where camping, lodging, and other services are offered. Year-round services are provided at Grant Grove, the Foothills, and Giant Forest & Lodgepole. The Mineral King and Cedar Grove areas are open from spring through fall.

The parks are open 24 hours a day , 365 days a year. Occasionally, winter storms will close some park roads until they can be plowed. Other park roads are closed during winter months .