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Lassen Volcanic National Park historic black and white photograph of Lassen peak erupting in 1915
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Lassen Volcanic National Park

Come witness a brief moment in the ancient battle between the earth shaping forces of creation and destruction. Nestled within Lassen's peaceful mountain forests you will find that hissing fumaroles and boiling mud pots still shape and change the land.

 
A skier carves a turn in Lassen's backcountry

Lassen Backcountry Ski Patrol Film

Hundreds of visitors attended the first Lassen Film Festival on January 14. In celebration of outdoor film and fun the event featured Lassen's newest film, Earn Your Turns, introducing the dedicated group of volunteers that comprise Lassen Volcanic Backcountry Ski Patrol.
 
ranger-led-snowshoe-walk

Ranger-led Snowshoe Walks

Join a park ranger for a one and one-half to two-hour adventure exploring winter ecology and Lassen's geologic history in the Southwest area. Ranger-led snowshoe walks are offered Saturday and Sunday at 1:30 p.m. December 17, 2011 through April 8, 2012. more...

 
Snowshoers at Sulphur Works hydrothermal area

Planning Your Winter Visit



 
Lassen Volcanic Social Media

Lassen Volcanic Social Media

Lassen Volcanic National Park is experimenting with new ways to bring the park experience to visitors. We are currently using Twitter and YouTube. We hope that this will better help you to connect with Lassen Volcanic National Park. more...

 

The eruption of Lassen Peak and what it means

On May 22, 1915, an explosive eruption at Lassen Peak, the southernmost active volcano in the Cascade Range, devastated nearby areas and rained volcanic ash as far away as 200 miles to the east. This explosion was the most powerful in a 1914-17 series of eruptions that were the most recent to occur in the Cascades prior to the 1980 eruption of Mt. St. Helens. Lassen Peak is the largest of a group of more than 30 volcanic domes erupted over the past 300,000 years in Lassen Volcanic National Park.
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Explore the Hydrothermal Areas

Hydrothermal (hot water) features at Lassen Volcanic fascinate visitors to this region of northeastern California. Boiling mud pots, steaming ground, roaring fumaroles, and sulfurous gases are linked to active volcanism and are all reminders of the ongoing potential for eruptions in the Lassen area. Nowhere else in the Cascade Range of volcanoes can such an array of hydrothermal features be seen.
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Write to

Lassen Volcanic National Park
P.O. Box 100
Mineral, CA 96063-0100

E-mail Us

Phone

Visitor Information
(530) 595-4480

Administration
(530) 595-6100

Fax

(530) 595-3262

Climate

Weather plays a dramatic role at Lassen Volcanic National Park. Winter, especially, shapes the landscape; snow generally begins to accumulate each year in October, doesn't melt in most places until July, and can remain in isolated areas year round.  Summer weather is more predictable, with warm, dry days, blue skies, and cool nights. Visitors to Lassen Volcanic National Park should be prepared for any kind of weather, any time of the year.
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View of devastated area from Main Park Road.

Did You Know?
The 29 mile Main Park Road was constructed between 1925 and 1931, just 10 years after Lassen Peak erupted. Near Lassen Peak the road reaches 8512 feet, making it the highest road in the Cascade Mountains. It is not unusual for 40 feet of snow to accumulate on the road near Lake Helen.

Last Updated: December 29, 2011 at 10:50 MST

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