Lassen Peak, the largest plug dome volcano in the world, is joined by all three other types of volcanoes in this park: shield, cinder dome, and composite. Other than the volcano, which last erupted in 1915, the park has hydrothermal areas, including fumaroles, boiling pools, and steaming ground, heated by molten rock under the peak.
Dave R. on Lassen Peak
Beautiful hike! We enjoyed hiking through the snow on Independence Day. Some tough inclines, but well worth it!
Gretel V. on Mill Creek Falls Trail
Great hike when the roads close down for the winter. Pack a picnic lunch to eat near the waterfall!
My boys (6, 8 and 9) completed this hike late in the summer - we camped overnight at Summit Lake the night before and hit the trail mid-morning. The hike was tough, as it is nothing more than a stack of switchbacks going up a 1:1 incline... A Ranger gave a brief history of the park, the volcano and associated volcanic activity at the top, including in his presentation photos and samples of various rocks found in the park. The kids really enjoyed the opportunity to learn. Views are great, trail is very exposed. Bring lots of water, a good wide brimmed hat and lots of sunscreen.
Finished this trail today. Pretty brutal. Combination of the snow and ash terrain made the ascent extremely difficult, but I did it. I thought the descent through the Bypass was also dicey, as the initial trail down was steep and was very rocky. So had to take it slow going down or else I would've slipped.
All in all, very challenging hike in the snow and can imagine it would still be challenging during other seasons. Would recommend if you're in the area!