SeasonsLassen Volcanic National Park is open 24 hours per day, 365 days per year. Summer (July – September): Greatest access to activities, services, and park areas/features; highest number of visitors. 2020-2021 DatesFacilities are open 24 hours unless noted otherwise. COVID-19 Modifications: All opening and closing dates are subject to change based on future conditions and public health guidance. We will continue to evaluate and adapt to changing COVID-19 guidance and adjust operations as needed. Southwest Area
Manzanita and Summit Lake Areas
Warner Valley - Juniper Lake - Butte Lake Areas
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Last updated: December 28, 2020