Lassen Volcanic National Park is open 24 hours per day, 365 days per year. You do not need a reservation to enter the park.
Visiting in Spring
Access to snow-free park areas/features and the number of visitors gradually increase between April and June.
Visiting in Summer
The park is its busiest in the months of July through September when nearly all activities, services, and areas/features are accessible.
Visiting in Fall
Most areas of the park remain accessible in October and November while services gradually decrease.
Visiting in Winter
Plan your visit in the winter/spring snow season.
2022 Operating Dates
Facilities are open 24 hours unless noted otherwise.
Manzanita and Summit Lake Areas
Warner Valley - Juniper Lake - Butte Lake Areas
Last updated: November 11, 2022