Lassen Peak, also known as Mount Lassen, is the southernmost active Volcano in the Cascade Range. It is part of the Cascade Volcanic Arc which is an arc that stretches from southwestern British Columbia to northern California. Located in the Shasta Cascade region of Northern California, Lassen rises 2,000 ft (600 m) above the surrounding terrain and has a volume of 0.5 cu mi (2 km3), making it one of the largest lava domes on Earth. It was created on the destroyed northeastern flank of now gone Mount Tehama, a stratovolcano that was at least 1,000 ft (300 m) higher than Lassen Peak.
Unlike most lava domes, Lassen Peak is topped by craters. A set of these craters exists around the summit of Lassen Peak, although two of them have been covered up by solidified lava and sulfur deposits. Lassen Peak is the largest of a group of more than 30 volcanoes that have erupted over the past 300,000 years in the Lassen Peak volcanic area.
Lassen Peak has the highest known winter snowfall amounts in California. There is an average annual snowfall of 660 in (1,676 cm), and in some years, more than 1,000 in (2,500 cm) of snow falls at its base altitude of 8,250 ft (2,515 m) at Lake Helen. The Mount Lassen area receives more precipitation (rain, sleet, hail, snow, etc.) than anywhere in the Cascade Range south of the Three Sisters volcanoes in Oregon. The heavy annual snowfall on Lassen Peak creates fourteen permanent patches of snow on and around the mountain top, despite Lassen's rather modest elevation, but no glaciers. Lightning has been known to strike the summit of the volcano frequently during summer thunderstorms.
Elevation: 10,462 ft (3,189 m)