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Lassen Country Hikes

December 18, 2019 by Backcountry Press 3 Comments

Updated Hiking Maps

The book’s trail guide showcases the geologic history of the Lassen country. We have selected hikes that provide examples of the Lassen Volcanic Center and regional geology. USGS 1:24,000 scale maps show the trails and parking locations. The guide is illustrated but watch for references to figures and tables in previous chapters. Also, important background information about the geology in each hiking guide is discussed.

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Bumpass Hell Trail

August 26, 2019 by Backcountry Press 2 Comments

Geology of the Lassen Country

Bumpass Hell Trail
Bumpass Hell Hike Map

The Bumpass Hell Trail is one of the most popular destinations in the Lassen Country. The trailhead is at the large parking area 0.25 mile (0.4 km) east of Lake Helen. The trail traverses the dacite of Bumpass Mountain for the majority of the hike. Also, note the well-preserved glacial polish and striae in the dacite alongside the first few hundred yards of the trail. They were created by the glacier that started from the Lake Helen cirque. At the viewpoint where the trail turns east, about 0.5 mile (0.8 km) from the trailhead, it crosses briefly into andesite of Mount Diller. Here a National Park Service trailside interpretive display shows a model of Brokeoff Volcano before erosion.

Trailhead: Bumpass Hell trailhead parking lot
Distance: 3.0 miles (4.8 km) round trip
Key Geologic Features: Hot springs, clay-altered bedrock

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Lassen Geology

April 28, 2019 by Backcountry Press Leave a Comment

The Earth is not always quiet. An isolated region of northeast California offers a land of boiling springs, steaming sulfur vents, mud pots, and volcanoes. The boisterous geology of the southern Cascades is defined by Lassen Volcanic National Park. A complex and compelling geologic story is told in The Geology of the Lassen Country, a new book by R. Forrest Hopson and Michael A. Clynne.

June 14, 1914 phreatic eruption of Lassen Peak from near Manzanita Lake. Photograph by B.F. Loomis, courtesy of National Park Service.
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