The Fallon Geothermal Exploration Project was developed to determine which Navy-controlled lands near the Naval Air Station (NAS), Fallon, Nevada, had the highest potential for geothermal development. The project studies primarily NAS Fallon and Ranges Bravo 16 and Bravo 19. Some data (mercury study data for the ranges and temperature gradients for NAS Fallon) are incomplete and will later supplement this report. The areas having the highest geothermal development potential are (1) the southern portion of NAS Fallon, located over a fairly shallow thermal anomaly (300 degrees F at a depth of 2400-3000 feet); and (2) the north-northwest portion of Range Bravo 19, with Lee Hot Springs and intersecting lineaments that could be conduits for geothermal fluids. A detailed regional geophysics study and a dipole-dipole resistivity survey could provide necessary data on the basin structure and other aspects of the Fallon area.