Lake Calavera Preserve is located in Carlsbad, CA and is home to one of North America's smallest volcanoes. It is the end peak of each trail and is what's known as a "volcanic plug" (cool hardened lava). The northern face of Mount Calavera is that of columnar joints- columns of molded lava. Geologists believe the volcano erupted 15-20 million years ago leaving behind columns of lava which make Mount Calavera what it is today.

Lake Calavera also has an abundance of fishing and wildlife. So if you plan on fishing, there are plenty of spots on shore, as well as locations to launch a raft or kayak to troll the water. The Lake also provides a great number of birds and other animals which make this place a must go for photographers.

The main trailhead begins off Tamarack Ave starting with a paved road. This road eventually leads you to the dam, which dates back to the Second World War. You will cross the Lake and over look a creek off the hillside which runs during the winter months. The path continues looping toward Mount Calavera. Once you reach the top head back down the south side of the peak and you will continue the long, but scenic way back to the main trailhead (6.24mi).