Some of the oldest exposed rock in the entire Sierra Nevada range can be found right here at Convict Lake. Look for the burgundy buckle that twists its energy across the gray granite on the opposite side of the lake. Hike over to it! Fishing, kayaking, picnicking & a good place to start off into the High Sierra back country. In the early days this was known as Monte Diablo Lake, before the bad guys had their shootout with the law.