|Nearest major airport:||Reno, Nevada|
|Convenient Center:||Susanville, California, (approaching from the east) Red Bluff or Redding,, California , (approaching from the west)|
Lassen Peak is only one of two active volcanoes in the contiguous United States, the other being Mount Saint Helens (8,364 ft.). Prior to 1914, it seemed to be a volcanic plug, and was believed to be extinct. In 1914, it erupted for the first time in what would be a series of 150 eruptions over the next three years. Its violent fit of eruptions ceased in 1917, but Lassen is still considered active.
Lassen is the southernmost volcano in the Cascade range, located in Lassen Volcanic National Park. The park holds several volcanic peaks, including Cinder Cone (6,913), Prospect peak (8,342 feet) and Mount Harkness (8,039 feet), plus several smaller peaks and great lava fields, hot springs, hot lakes, and mud volcanoes, all connected with an excellent network of hiking trails. All of the cones, including Lassen, are easily climbed.