Mariposa County is home to many rock-hounds with many more coming to visit our hills in search of unique rocks and quartz crystals that practically fall out of our hills. The vast majority of Mariposa County is National Park, National Forest, or Private land which makes proper rock-hunting more difficult.
Considering that Mariposa County was one of the major epicenters of the 1800 Gold Rush, many gold claims dot the Merced River and digging on an active claim may become a dangerous undertaking.
The best method to rock-hounding in Mariposa County is to get to know locals. Wander into a local rock or gem shop, asking around, or even visit the California State Mining and Mineral Museum for more information.