Lassen Peak

The Lassen Peak Trail is about 5 miles round trip, climbing roughly 2,000 feet in a series of switchbacks up the volcano's flank to the summit at 10,457 feet. It is strenuous, gaining significant elevation at high altitude, so most hikers take several hours and pace themselves on the steady ascent.

Along the way, the trail passes weathered volcanic rock and, often well into summer, patches of snow. Near the top, the landscape becomes stark and rocky, with the jagged summit crater and knobs of hardened lava, remnants of the mountain's eruptive past. The panoramic views from the top reward the effort.

Lassen Peak is a plug dome volcano, formed as thick lava was pushed up like paste and piled into a steep dome. Its 1914 to 1917 eruptions were the most recent in the Cascade Range until Mount St. Helens in 1980, and the devastated area on the mountain's flank still shows the effects.

Because it climbs high and the weather can change quickly, the summit hike calls for preparation: start early, carry plenty of water and sun protection, and bring warm layers, since it can be cold and windy on top even in summer. Snow can linger on the trail into the warmer months, so it is wise to check current conditions before setting out.

The closest Boutel™ stays, so you can turn this stop into an overnight. Each is a place we chose through independent editorial review, never a paid placement.

Lassen Peak is a plug dome volcano and the centerpiece of Lassen Volcanic National Park in California, rising to 10,457 feet. It is one of the largest plug dome volcanoes in the world, formed as thick lava was pushed up and piled into a steep dome. Lassen erupted dramatically between 1914 and 1917, and those were the most recent eruptions in the Cascade Range until Mount St. Helens in 1980. A steep trail climbs about 5 miles round trip to the summit, passing volcanic rock and lingering snow, and rewarding hikers with sweeping views across the park's volcanic landscape and, on clear days, distant Mount Shasta. It remains an active volcano and a firsthand window into the forces that shaped the park.

The Lassen Peak summit hike is strenuous. It is about 5 miles round trip with roughly 2,000 feet of elevation gain, climbing switchbacks up the volcano's flank to 10,457 feet. The combination of steady steep climbing and high altitude makes it challenging, and most hikers take several hours to complete it, pacing themselves and resting along the way. Snow can linger on the trail into summer, adding difficulty, so it is important to check current conditions. To hike it safely and comfortably, start early, carry plenty of water and food, wear sturdy shoes, bring sun protection, and pack warm layers, since the exposed summit can be cold and windy even on a warm day. For prepared, reasonably fit hikers, it is a rewarding climb.

Lassen Peak last erupted in a series of events from 1914 to 1917, with the most powerful explosions in 1915. During this period, the volcano sent columns of ash and steam into the sky and produced an avalanche and mudflows, along with a blast that devastated an area on the mountain's flank still visible today. These were the most recent volcanic eruptions in the Cascade Range until Mount St. Helens erupted in Washington in 1980. Lassen is still considered an active volcano, and the park's many hydrothermal features, such as boiling mudpots and fumaroles, show that heat and volcanic activity continue beneath the surface. The eruptions were a major reason the area was protected as a national park.

From the 10,457-foot summit of Lassen Peak, the views stretch across a vast volcanic landscape. Below and around you lie the park's cinder cones, lava flows, hydrothermal basins, and forested slopes dotted with lakes. To the north, on clear days, the great glacier-clad cone of Mount Shasta rises on the horizon, and in other directions you can see far across northern California's mountains and valleys. Near the summit itself, you can examine the jagged crater area and knobs of hardened lava left from the eruptions. The wide, high vantage gives a powerful sense of the volcanic forces that built the entire region. Clear days offer the best views, so an early start also helps beat afternoon clouds.