Mount Massive Mount Massive Mount Massive is the second-highest summit of the Rocky Mountains of North America and the U.S. state of Colorado. The prominent fourteener of the Sawatch Range is located in the Mount Massive Wilderness of San Isabel National Forest, west-southwest (bearing 247°) of the City of Leadville in Lake County, Colorado, United States. Mount Massive edges out the third-highest summit of the Rockies, Mount Harvard, by , but falls short of Mount Elbert by . It ranks as the third-highest peak in the contiguous United States after Mount Whitney and Mount Elbert. Mount Massive was first surveyed and climbed
Lassen Peak the Geographic Names Information System lists the mountain's elevation at . Lassen Peak marks the southernmost major volcano in the Cascade Range, rising above the northern Sacramento Valley. Bounded by the Sacramento Valley and the Klamath Mountains to the west and the Sierra Nevada mountain range to the south, it is the second tallest peak in the California segment of the Cascades, behind Mount Shasta, which lies to the north. Due to its proximity to nearby volcanoes Mount Tehama and Mount Diller, it is not easy to distinguish from its neighboring peaks. Lassen Peak has the highest known winter snowfall