West Valley Reservoir Hot Spring
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.
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
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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...