Lassen Peak Mountain

Address: Lassen Peak, Lassen Volcanic National Park, California, USA

Website: https://www.nps.gov/lavo/

Hours: Park open year-round; road and trail access seasonal

Admission: Park entrance fee (Lassen Volcanic National Park) - current NPS vehicle fee (typically around $30; check NPS for up-to-date rates)

Lassen Peak is a volcanic summit in northern California and the dominant peak within Lassen Volcanic National Park, notable for its elevation and historical eruptions.

A steep trail leads to the summit and offers wide panoramic views across the park; hikers commonly ascend to experience the volcanic landscape and summit panoramas during the snow-free season. The peak is also known as one of the southernmost active volcanoes in the Cascade volcanic arc.

The peak produced a series of eruptions in 1914-1917 that altered the cone and produced ash and lava flows; the eruptions were among the most notable volcanic events in the continental United States in the 20th century.

Lassen Peak stands within Lassen Volcanic National Park in northern California, surrounded by volcanic terrain, conifer forests and alpine meadows.

• Elevation: The summit rises to 10,457 ft (3,187 m).
• Last major eruption: Significant eruptive activity occurred in 1914-1917 and the mountain remains geothermally active, with volcanic monitoring in place.

Lassen Peak is in Lassen Volcanic National Park (northeastern California). The usual approach is by car into the park from US-395/CA-44/CA-89; Redding is the nearest regional city (about a 1-1.5 hour drive, roughly 60-70 miles / ~100-110 km). Inside the park, follow park roads to the Manzanita Lake/Lassen Peak trailhead where the marked Lassen Peak Trail begins - the summit trail is a strenuous but well-established hike of about 5 miles round trip from the trailhead.

• Visit in mid-summer to early fall (typically July-September) for the most reliable snow-free trail access and to ensure park roads and trailheads are open; snow can persist well into July at higher elevations.
• Start the Lassen Peak hike very early to avoid afternoon thunderstorms and to take advantage of calmer morning conditions and better visibility; check the National Park Service site for road and trail closures before you go.
• Combine your summit attempt with nearby short interpretive trails (the Devastated Area) and ranger programs - check NPS updates for seasonal programs and any backcountry advisories that could affect your route.