Management of Subterranean Ecosystems in Extreme Environments
Monte Neva Hot Springs

Map coordinates:  39.3269, -116.857
Water temperature:   161.6°F
Site ID:   NV-278

Spencer Hot Springs

Spencer Hot Springs. Image courtesy of the Nevada Commission on Tourism.

The hot springs and wells at Spencer Hot Springs are located mainly in the SE¼ Sec. 13, T17N, R45E (projected). There are also springs to the east of the main spring area (figure), in Sec. 14, T17N, R45½E (Fiero, 1968). Meinzer (1917, p. 50, 91) reported the presence of a travertine terrace nearly 1.6 km long and 0.8 km wide with spring deposits not more than 15 m thick. According to Meinzer (1917), the main spring is 62°C, the north spring is 47°C, and the east spring "normal." Both excavated and developed stock-watering pools on the site are used for bathing by visitors, although no exact temperatures are reported (Williams, 1996, p. 40). Some flow may be from open wells, drilled in the 1940s (U.S. Bureau of Land Management Environmental Assessment NV063-Eao4-59, 2004). Hot water from the main spring is carried by steel pipe to a concrete-lined pool. The temperature of the hottest spring was measured in June 2002 to be 72.1°C (Sanders and Miles, 1974). Wollenberg (1974b) reported that the spring has slightly anomalous radioactivity (19 μR/hr).

Except for Sanders and Miles (1974), who reported that the springs are at the boiling point, the highest temperature (72°C) was recorded by Mariner and others (1974), who suggested that the best estimate of the reservoir temperature is 123°C, using the silica geothermometer. Trexler and others (1980) reported a 72.5°C temperature from the spring. Fiero (1968) believed that the water discharging at Spencer Hot Springs may originate in Monitor Valley to the east after flowing through the intervening Paleozoic carbonate and clastic rocks. The geology of the hot springs and surrounding area is also shown on the 1:62,000 geologic map by McKee (1968). Phillips Petroleum Co. drilled 4 temperature-gradient drill holes in the vicinity of Spencer Hot Springs in 1980 to depths ranging from 29.6 to 64.0m and encountered temperatures no higher than 16.8°C (Sass and others, 1999).

N_Big_Smoky_Valley.pdf Get Topo Map On the Web New Hotspring Search

Spencer Hot Springs


  1. Sample date:1962-04-28
  2. Sodium (Na):200
  3. Potassium (K):36
  4. Lab-test pH:6.5
  5. Calcium (Ca):43
  6. Total dissolved solids:n/a
  7. Magnesium (Mg):9.39
  8. Iron (Fe):0.059
  9. Strontium (Sr):n/a
  10. Lithium (Li):n/a
  11. Boron (B):2.59
  12. Silica (SiO2):77
  13. Bicarbonate (HCO3):673
  14. Sulfate (SO4):51
  15. Chloride (Cl):22
  16. Fluoride (F):4.699


Image by Dr. Jean K. Krejca, Zara Environmental LLC

Cave ecosystems are often dependent on organic material carried in by water, which serves as the primary food source for the environment. In arid climates with minimal surface rainfall, the input of organic matter and nutrients into caves becomes limited, affecting the overall energy flow within these environments. The intricate interplay between surface conditions and cave biota presents unique management challenges for modern cave biologists. Image courtesy of Dr. Jean K. Krejca, Zara Environmental LLC.

Hydrographic Great Basin

Ruby Crest, Nevada

The Hydrographic Great Basin is a 200,000 square mile area of the American West that extends from the Sierra Nevada Range in California to the Wasatch Range in Utah, and from southern Oregon to southern Nevada. The entire basin contains what's called an endorheic watershed. All precipitation in this region evaporates, sinks underground, or flows into lakes. No water reaches the ocean.

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JUNE 29, 2023
NCKMS Steering Committee Chooses Ely, Nevada as Host City for 2025 Symposium
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