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California
Lassen Volcanic
Field Guide
A still-active volcanic landscape of steaming vents, boiling mud pots, and a plug-dome peak that last erupted in 1915.
A complete planning guide to Lassen Volcanic National Park. Covers the park's rare mix of all four volcano types (shield, plug dome, cinder cone, and composite), boardwalk safety at hydrothermal areas like Bumpass Hell and Sulphur Works, the 1914-1917 eruptive period and the Devastated Area it left behind, best hikes including the Lassen Peak Trail and Cinder Cone, camping and lodging at Manzanita Lake and beyond, and seasonal road closures on the park's main route, SR 89.
- 14
- pages
- instant download
- Jul 2026
- last updated
What's inside
- 1Safely exploring Bumpass Hell, Sulphur Works, and the park's boiling hydrothermal areas
- 2The science behind Lassen's rare four volcano types and its 1915 eruption
- 3Best hikes: Lassen Peak Trail, Cinder Cone, Kings Creek Falls, and more
- 4Seasonal road closures on SR 89 and when the park is actually accessible
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14 pages · PDF download
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Inside every guide
The Lassen Volcanic guide, page by page
A 14-page print-at-home PDF field guide to Lassen Volcanic, California.
- 01Welcome to Lassen Volcanic
- 02Rules & basics
- 03First-time logistics
- 04Four volcanoes, one park
- 05Park overview
- 06Steam, mud, and boiling water
- 07Best hikes
- 08Wildlife
- 09Weather & seasons
- 10Camping & lodging
- 11Beyond the main road
- 12Pocket cards
- 13Trail quick-card
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$9.99
$9.99