Park Highway Closed for Winter Season
Lassen National Park Highway is closed to through traffic for the winter season. The highway will remain open to the the Kohm Yah-mah-nee Visitor Center (1 mile from the SW entrance) and Manzanita Lake (1 mile inside the NW entrance). More »
Hiking Lassen Peak Trail
Start: Lassen Peak parking area
For information on the "Reach the Peak Project," including planned trail closures, please follow this link.
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 last to occur in the Cascades before 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.
The Trail: The trail to the top of Lassen Peak begins at the peak parking area at an elevation of 8500 feet. The popular trail is 2.5 miles one-way to the summit. There are many fantastic vistas of the park and surrounding areas from the trail (see picture gallery below). The summit provides one of the most spectacular views of the Devastated Area, a view from the top looking down (see picture in gallery below). This view is the best vantage point to contemplate the power of the 1914-17 eruptions. The lingering rotten-egg smell of hydrogen sulfide near the summit reminds visitors that Lassen is still considered an active, but dormant, volcano.
There are many switchbacks and the trail can be steep and rocky at times. Hiking boots are recommended. A round trip takes 3 to 5 hours.
Did You Know?
The reddish color sometimes observed on top of snow at Lassen Volcanic NP snow is a living organism called snow algae. When snow begins to thaw, these microscopic organisms spring to life. They function as a primary food source and are being studied for their cancer-fighting properties.