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Entrance
$30
No permit needed
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⭐ Highlights
→Lassen Peak — active volcano summit (5 mi RT)
→Bumpass Hell — largest hydrothermal area
→Devastated Area — 1915 eruption moonscape
→Manzanita Lake — volcanic lake camping
⚠ Before you go
!Hydrothermal areas dangerous — stay on boardwalks
!Main park road closed November through late May
!Lassen Peak may require ice axe in spring
When to visit
Lassen Volcanic by Season
Spring (May–Jun)
Road opens. Wildflowers peak.
Summer (Jul–Sep)
All access. Best summit.
Fall (Oct)
Brief window before snow.
Winter (Nov–Apr)
Snowshoeing. Road closed.