At 171°F, the source water at West Valley Reservoir Hot Spring is hot enough to cause burns. Some hot springs this hot have cooler side pools or downstream areas suitable for soaking — always test the water temperature before entering.
West Valley Reservoir Hot Spring flows at 171°F in the volcanic highlands near Alturas, discharging water 121.5 degrees above ambient temperature. At 4,817 feet elevation in Modoc County, this powerful thermal spring represents significant geothermal resource in the remote plateau.
The spring emerges in terrain shaped by Cascade volcanism and Modoc Plateau faulting, surrounded by ponderosa pine and mixed conifer forest at the edge of high desert grasslands. Located over three-quarters of a mile from the nearest road, it sits in genuine backcountry where volcanic geology dominates and thermal features appear amid quiet wilderness character.
History of West Valley Reservoir Hot Spring
West Valley's thermal output reflects Cascade geothermal systems, where young volcanism and ongoing magmatic circulation provide heat to deep groundwater reservoirs. The spring's remarkable temperature elevation above ambient conditions indicates vigorous circulation to significant depths in an active geothermal province.
Access requires a 1.3-mile walk from the nearest road in Modoc National Forest, making this a true backcountry destination for hikers combining spring exploration with wilderness travel. Patterson Guard Station, 16.3 km away, offers a historic basecamp for extended exploration of this remote geothermal region.
Is West Valley Reservoir Hot Spring worth visiting?
Best for
Observing powerful hot springs
Overnight camping trips
Not ideal for
Casual soaking
West Valley Reservoir Hot Spring is well suited for observing powerful hot springs and overnight camping trips.
Monthly Climate
31°Jan
32°Feb
37°Mar
44°Apr
53°May
64°Jun
74°Jul
73°Aug
64°Sep
51°Oct
39°Nov
30°Dec
Annual Precip: 19.6 inAnnual Snow: 63.4 in
Best Time to Visit
DecemberAir 30°F · Water 171°F · +141° contrast
JanuaryAir 31°F · Water 171°F · +140° contrast
FebruaryAir 32°F · Water 171°F · +139° contrast
December offers 44°F more contrast than July
Nearby Camping
Patterson Guard Station10.1 mi away
Overview
*Altitude is 7,080 feet above sea level*
Set on the edge of a meadow surrounded by Aspen, Fir and Pine trees, Patterson Guard Station has stood since 1921. It served the Modoc National Forest as a fully staffed fire office and guard station until 1981.
Just a few footsteps from the Summit Trail and one-quarter mile from the wilderness boundary, Patterson Guard Station can be your basecamp for trips into the South Warner Wilderness or the perfect place to disconnect and relax. The...
What is the water temperature at West Valley Reservoir Hot Spring?
West Valley Reservoir Hot Spring has a water temperature of 171°F (77°C). This is considered a hot spring, well above body temperature.
Where is West Valley Reservoir Hot Spring located?
West Valley Reservoir Hot Spring is located in Modoc County, California at 4,817 feet elevation, near Alturas. Coordinates: 41.1900°N, 120.3830°W.
How do I get to West Valley Reservoir Hot Spring?
West Valley Reservoir Hot Spring has Short Walk road access (0.8 mi from the road).
Can I camp near West Valley Reservoir Hot Spring?
Yes, Patterson Guard Station is located nearby (10.1 miles away).
Is it safe to soak at West Valley Reservoir Hot Spring?
The water at West Valley Reservoir Hot Spring reaches 171°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. Access may be on private land or unconfirmed — verify current conditions before visiting. Always tell someone your plans before visiting remote hot springs.
Is West Valley Reservoir Hot Spring crowded?
West Valley Reservoir Hot Spring sees varying levels of visitors depending on the season and day of the week.
What should I bring to West Valley Reservoir Hot Spring?
Essentials for West Valley Reservoir Hot Spring: 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.