SeasonsLassen 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 SpringAccess to snow-free park areas/features and the number of visitors gradually increase between April and June. ![]() Visiting in SummerThe park is its busiest in the months of July through September when nearly all activities, services, and areas/features are accessible. ![]() Visiting in FallMost areas of the park remain accessible in October and November while services gradually decrease. ![]() Visiting in WinterPlan your visit in the winter/spring snow season. 2022 Operating DatesFacilities are open 24 hours unless noted otherwise. Southwest Area
Manzanita and Summit Lake Areas
Warner Valley - Juniper Lake - Butte Lake Areas
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Last updated: November 11, 2022