Hikers on Lassen Peak Trail, Lassen Volcanic National Park
Brokeoff Mountain is the furthest mountain on the left. The closest peak is Eagle Peak and the peak in the middle is probably Mount Diller. All three of these mountains were part of ancient Mount Tehema's caldera before it eroded away. Off in the distance is northern Sacramento Valley.
The hike up Lassen Peak is open intermittently while it undergoes rehabilitation. The trail is about 2.5 miles one way with a gain of 1,800 feet.