If you should stop at the Convict fishing resort you may wonder about the vistas rising before you. The panarama has two magnificent pikes, a deep cold lake, and gravel on all sides.
The biggest thing that happened here is a very large volcano blew around 760,000 years ago. The volcano was active because a hot zone developed due to forces crunching and building the Sierra Nevada Mountains on the U.S. west coast. Cailifornia Hwy. 395 cuts through the Long Valley Caldera, the main feature of that long ago event. That moment in time is also evident as you drive up Hwy. 395 from Los Angeles, because basalt and cinder cones litter the scenery.
Later, about 20,000 years ago, cold set in and huge glaciers crawled down the mountains and left piles of rock called moraines. Convict Lake formed because a moraine is acting as a natural dam holding the water back.