Lassen Volcanic National Park (Official GANP Park Page)

Lassen Volcanic National Park of California is home to Mount Lassen which is the largest plug dome volcano in the world.

Lassen Volcanic National Park - Wikipedia

Lassen Volcanic National Park: Lake Helen

Operating Hours & Seasons - Lassen Volcanic National Park (U.S. National Park Service)

Lassen Volcanic National Park, Official Profile

Lassen Volcanic National Park, Official Profile

Lassen Volcanic National Park (U.S. National Park Service)

Mount Lassen - All You Need to Know BEFORE You Go (with Photos)

USA Collectible Souvenir Decal - National Park Series - California - Will you See Them All?

Lassen Volcanic NP - Entrance Sign Edition

Lassen Volcanic National Park (Official GANP Park Page)

Park Junkie - Your Fix for National Park InfoPark Junkie

Lassen Volcanic National Park, Official Profile