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3.8
6 votes

Sulphur Works

Lassen Volcanic National Park, California USA

Free
Free to Visit
Open Now
Wed 12a-11:59p
  • Independent
  • No Public
    Restrooms
  • No Wifi
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Due to the spread of COVID-19, some points of interest may be closed or have restrictions. Please stay safe and call ahead to get the latest information.

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“the volcanic center of the ancestral Mount Tehama”

As in many hydrothermally active areas, the rocks at Sulphur Works and Little Hot Springs Valley in Lassen Volcanic National Park have been chemically altered into bright-colored clays. Sulfurous acid and sulfuric acid have broken down hard, gray-green andesite lavas into red, yellow and buff clays and iron oxides. Many visitors pass through Sulphur Works on their way north on State Route 89 and sense the rotten-egg smell (hydrogen sulfide) when they pass by a hot vent to the east of the road. Sulphur Works is said to be the volcanic center of the ancestral Mount Tehama.

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Sulphur Works

Lassen Volcanic National Park
California
USA

Hours

Open 24 hours today
  • Sun - Sat: 12:00 am - 11:59 pm

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  • Parking
  • Pets Allowed
  • Restrooms
  • Wifi
  • Wheelchair Accessible
  • Credit Cards Accepted
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Parking

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