Geyser — Not a Soaking Spring
Terminal Geyser is a geyser, not a traditional hot spring. These geothermal features can be extremely dangerous — boiling water, toxic gases, and unstable ground are common hazards. Do not attempt to soak.
Terminal Geyser erupts at a blistering 205°F within Lassen Volcanic National Park, representing one of California's most dramatic active geothermal features.
Situated at 5,793 feet elevation in the Cascade Range's volcanic terrain, the geyser requires a short walk (1,054 meters from the nearest road) through landscape receiving heavy winter snow and abundant precipitation that feeds the park's geothermal activity.
History of Terminal Geyser
Terminal Geyser's violent eruptions result from Lassen's complex volcanic system, where groundwater circulates through heated rock before explosive release, a process active for thousands of years within the park's 300 volcanic domes.
The spring sits within National Park Service protection and lies near Warner Valley Campground (2.9 km away), with vault toilets and seasonal access. Visit in summer when trails are fully open and winter snow clears the approach.
Is Terminal Geyser worth visiting?
Best for
- Viewing dramatic geothermal features
- Overnight camping trips
Terminal Geyser is best appreciated as a dramatic geothermal feature rather than a place to soak.
Annual Precip: 40.8 in
Annual Snow: 184.3 in
December
Air 30°F · Water 205°F · +175° contrast
January
Air 31°F · Water 205°F · +174° contrast
February
Air 31°F · Water 205°F · +174° contrast
December offers 38°F more contrast than July
Overview
Warner Valley campground is a limited development facility in the south eastern area of the park. It has vault toilets and potable water spigots. Numerous trails can be accessed from the campground.
Recreation
Hiking trails accessible from the campground
Facilities
Vault toilets - seasonal
Natural Features
Lassen Volcanic national park is known for its volcanic history, as well as its diversity of plants and animals. It contains 300 active volcanic domes, as well as many hydrotherma...
Reserve on Recreation.gov →
Swimsuit & towel
Water bottle
Stay hydrated, especially in hot water
Camping gear
Nearby camping at Warner Valley Campground
Trash bag
Pack out what you pack in
Water shoes
Hot ground near source
USGS Quad: MT. HARKNESS 15 · PP 492: 38.0 · Circ 790: 40.0 · NOAA: 8.0 · AMS Map: SUSANVILLE
What is the water temperature at Terminal Geyser?
Terminal Geyser has a water temperature of 205°F (96°C). This is considered a hot spring, well above body temperature.
Where is Terminal Geyser located?
Terminal Geyser is located in Plumas County, California at 5,793 feet elevation, near Chester. Coordinates: 40.4210°N, 121.3750°W.
How do I get to Terminal Geyser?
Terminal Geyser has Short Walk road access (0.7 mi from the road).
Is Terminal Geyser free to visit?
Terminal Geyser has Open access. It is managed by National Park Service.
Can I camp near Terminal Geyser?
Yes, Warner Valley Campground is located nearby (1.8 miles away).
Is it safe to soak at Terminal Geyser?
The water at Terminal Geyser reaches 205°F, which can cause severe burns. Do not enter the source pool directly — look for cooled side pools or downstream areas where the water has cooled to a safe temperature. Always tell someone your plans before visiting remote hot springs.
Is Terminal Geyser crowded?
Terminal Geyser sees varying levels of visitors depending on the season and day of the week.
What should I bring to Terminal Geyser?
Essentials for Terminal Geyser: swimsuit, towel, water bottle, camping gear, a trash bag to pack out what you pack in. The water is over 110°F — test the temperature before entering and watch for scalding near the source.