The geothermal area of San Diego, framed by three hot springs sites, is located in the Central Cordillera, to the north of Romeral Volcano, previously considered as the northernmost Colombian Volcano. The hot springs are located in the vicinity of a magmatic intrusion (Puente Linda porphyry) and, two volcanoes located in the area: San Diego maar and El Escondido Volcano, this last identified during the very beginning of the geothermal reconnaissance in 2013. The geology of the area is dominated by outcrops of Cajamarca metamorphic complex, the main basement rock of the Central Cordillera and igneous intrusions. The igneous rocks were characterized by lithogeochemistry and geochronology. The rocks of the most recent age are intrusions of San Diego and El Escondido volcanoes (<50,000 years). The hot springs with a highest discharge temperature of 42°C, emerge from faults, fractures and contacts between intrusions and Cajamarca metamorphic rocks. The well differentiated water types (bicarbonate, chloride and mixed bicarbonate-chloride-sulfate), their ratio between conservative species (B/Cl) and their location, allow to suggest that they 3 can be separated systems. Although the geothermometers would not be very reliable considering the discharge temperatures, the deep fluid could reach temperatures above 250°C, in El Escondido zone.