Calf Creek Plateau is a 12,661-foot mountain in Colorado’s northern San Juan Mountains and the highest point of the Powderhorn Wilderness. Unlike a sharply isolated summit, it rises as a broad alpine highland within the San Juan volcanic field. Its bedrock consists of basaltic lava flows of the Hinsdale Formation, dated to about 16 to 19 million years ago and thought to be among the region’s last and best-preserved volcanic activity. Later glaciation carved cirques into the north side, including one holding Powderhorn Lakes. Together with nearby Cannibal Plateau, it forms one of the highest parts of this elevated volcanic landscape.