Lassen Peak, Mammoth Mountain, and the Mono-Inyo Craters are all volcanic formations located within the Sierra Nevada mountain range.

Lassen Peak: An active volcano and the southernmost active volcano in the Cascade Volcanic Arc.
Mammoth Mountain: A large volcanic dome with a history of volcanic activity.
Mono-Inyo Craters: A chain of volcanic craters and lava flows in the eastern Sierra Nevada.
These volcanic features demonstrate the ongoing geological activity within the Sierra Nevada and contribute to the region's diverse and dynamic landscape.