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In the north section of the park on Highway 89. This area was in the path of the pyroclastic flow from Lassen's eruption. All of the vegetation in the area was destroyed by hurricane force winds and burning hot gasses and mud. Since the eruption, the area is regrowing but there is still ample evidence of the destruction. A short, fairly level interpretive trail points out the results of the devastation and the subsequent natural recovery process.
The historic museum is located one mile from the northwest entrance of the park near Manzanita Lake. The museum is only open during the summer months. Visit for information, to view exhibits and the park film, shop at the educational bookstore, or participate in a ranger-led program.
On Highway 89, about one mile +(1.6 km) north of the Southwest Entrance. A small geothermal area with mudpots, fumaroles and hot water flow. Its small parking lot is right on the highway. A boardwalk allows for closer viewing of the features.