Road Guide to Lassen Volcanic National Park

by Paul E. Schulz

47 An EMERGENCY TELEPHONE is on the east side of the Park Road.

(0.4 mile)

48 HOT ROCK is one of the many large boulders carried from the top of Lassen Peak. In the mudflow of May 19, 1915, these boulders were known to the local people as “hot rocks” because they retained their heat for several days. These which were buried in the mudflow material formed enough steam to cause funnel-shaped “eruption pits” in the mud overlying them. These pits can still be seen by careful searching in the upper portion of the Devastated Area.

The Lassen Park Road is closed in winter beyond the skiing area at [No. 3] in the Road Guide.
—NPS photo by R. C. Milne

When the road is finally opened in early June, visitors drive through 20 ft. deep canyons of snow.
—NPS photo by R. C. Milne

Brokeoff Mountain, described at [No. 7] in the Road Guide, is part of the remnants of ancient Mt. Tehama.
—NPS photo by R. C. Milne