Geographical Features Mariposa County is characterized by rolling terrain, with deep canyons, and rushing streams. The elevation increases gradually with elevations beginning at below 1,000 feet at the western boundaries and approaching 11,000 feet to the east. Climate The lower elevations of the county have mild, wet winters with annual rainfall ranging from 20 to 30 inches.
Summers are warm and dry.
The upper elevations have abundant snowfall and mild, dry summers. Snow level is usually at 3,000 or above. It has a single runway of 3,300 feet and is 50 feet wide. It is generally above the winter fog of the San Joaquin Valley. Medical Care John C. Fremont Hospital and Clinic is located in the town of Mariposa.