Accessible via SR 36, 9 miles east of Mineral, Lassen Volcanic National Park covers 106,372 acres in northeastern California where the Cascades join the Sierra Nevada. In addition to Lassen Peak (10,457 ft.) and Cinder Cone (6,907 ft.), the park boasts Prospect Peak (8,338 ft.) and Mount Harkness (8,048 ft.), two shield volcanoes topped by cinder cones with trails leading to their summits. Other features include smaller volcanoes and lava flows, fumaroles, boiling springs, boiling lakes and mudpots. Learn More...