MGMC Facebook Free! Free! Free! The Club’s annual Mariposa Rockin’ Tailgate Rock Swap is held in the fall at the…
MGMC Facebook Springtime in Mariposa is an ideal time to hold the annual Gem and Mineral show. The hills are…
MGMC Facebook A few miles below El Portal on Highway 140, a roadside sign identifies the oldest (metamorphic) rock in…