The main park road (Hwy 89) is closed at Kohm Yah-mah-nee Visitor Center (southwest entrance) and Loomis Plaza/Manzanita Lake (northwest entrance) for the snow season. Please use caution if driving to the park and check weather forecasts: More
11/12/2024 - Due to recent snowfall, the Bumpass Hell Trail has closed for the season. This is an annual closure to prevent injury from treacherous trail conditions near hydrothermal areas.
38050 Highway 36 East Park Headquarters Mineral, CA96063
From Interstate 5 (Redding), take Hwy 44 - 48 miles east to the junction of Hwy 89. Follow Hwy 89 south 1 mile to the north entrance of the park. From Interstate 5 (Red Bluff) take Hwy 36 E - 51 miles east to the junction of Hwy 89. Follow Hwy 89 north 6 miles to south entrance of the park.
The park is always open. Road access is limited during the winter season, approximately November through May, due to snow.
Weather at Lassen can vary dramatically throughout the year.
Average January temperatures are a high of 40.4 °F (4.7 °C) and a low of 20.8 °F (-6.2 °C). Average July temperatures are a high of 88.4 °F and a low of 49.8 °F. Temperatures reach 90 °F or higher on an average of 36.9 days, and drop to 32 ° or lower on an average of 164 days days annually.
This year-round visitor center is located one mile from the Southwest Entrance. The visitor center offers an information desk, exhibit hall, auditorium, amphitheater (summer), park store, dining area, patio (summer), and a gift shop and cafe (summer). Free Wi-Fi is available inside.
Closed today
Sunday and Monday:9:30 AM–4:30 PM
Tuesday and Wednesday:Closed
Thursday-Saturday:9:30 AM–4:30 PM
Current standard hours. Hours may vary based on weather conditions, emergency situations, and staffing.
The historic museum is located one mile from the northwest entrance of the park near Manzanita Lake. The museum is only open during the summer months. Visit for information, to view exhibits and the park film, participate in a ranger-led program. From the museum you can pick up the trail around Manzanita Lake or cross the highway to access the self-guided, interpretive Lily Pond Nature Trail. Lassen Association store is across the plaza from the Museum.
Closed today
Current Hours (Closed in Winter & Spring)
October 20–May 26
Every Day:Closed
Loomis Museum is closed for the winter and spring seasons (November 1 until Memorial Day weekend).
Standard Hours
Sunday-Tuesday:9:30 AM–4:30 PM
Wednesday and Thursday:Closed
Friday and Saturday:9:30 AM–4:30 PM
Current standard hours. Hours may vary based on weather conditions, emergency situations, and staffing.
Closures & Seasonal Exceptions
Closed in Winter & Spring
October 20–May 26
Every Day:Closed
Loomis Museum is closed for the winter and spring seasons (November 1 until Memorial Day weekend).
Holidays
2025–2026
New Year's Day
January 1, 2026
Closed
Birthday of Martin Luther King, Jr.
January 19, 2026
Closed
Washington's Birthday
February 16, 2026
Closed
Memorial Day
May 26, 2025
Closed
Veterans Day
November 11, 2025
Closed
Thanksgiving Day
November 27, 2025
Closed
Christmas Day
December 25, 2025
Closed
Holiday
Date
Hours
Public WiFi is available.
Free WiFi access is available inside the Kohm Yah-mah-nee Visitor Center at the Southwest Entrance of the park. Cellular access is extremely limited in the park. AT&T and Verizon service are strongest at Bumpass Hell parking area, Lassen Peak parking area, and Chaos Jumbles pullout (near Manzanita Lake).