• Lassen Peak from Hat Creek

    Lassen Volcanic

    National Park California

Environmental Factors

Crags Lake

High elevation lakes, including Crags Lake, at Lassen Volcanic NP in California are particularly sensitive to nitrogen and sulfur deposition.

NPS Photo

Air Quality
Most people who visit national parks expect clean air and clear views. However Lassen Volcanic National Park lies downwind of the populated Sacramento Valley and areas of agriculture and manufacturing. Pollutants emitted from these sources can harm the park's natural and scenic resources such as vegetation, surface waters, and visibility. Read more...

Climate Change
Lassen provides water for five California watersheds and habitat for hundreds of wildlife species. These resources are faced with changes influenced by climate change. Lassen and the National Park Service are taking action to both measure and mitigate climate change affects. Read more...

Phenology
Phenology is the study of the timing of life cycle events in organisms. Lassen Volcanic is one of seven pilot parks in California helping to establish park phenological monitoring projects. Lassen's phenology program relies heavily on scientific observations provided by citizen scientists like you. Read more...

Did You Know?

john muir posing on rock in black and white photo

John Muir visited Lassen Volcanic National Park and wrote about his experience in the book Mountains of California. "Miles of its flanks are reeking and bubbling with hot springs, many of them so boisterous and sulphurous they seem ever ready to become spouting geysers..."