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Based on the administrative location the research was located in Tomohon Selatan District, Tomohon, North Sulawesi Province. In the study area, there was a pattern of diverter that developed so that it could be of two types, namely the radial drainage pattern and parallel flow pattern. Through these drainage patterns and geomorphological aspects in the study area, one origin form is in the form of volcanic origin, which can then be grouped into five land forms. The research area is composed of volcanostratigraphic units arranged from old to young, namely, Khuluk Post - Tondano which is composed of Gumuk Lengkoan, Guml Panglombian, Gumuk Kasuratan, and Gumuk Linau. The presence of "Patriot" geothermal surface manifestations in the form of hot springs, warm springs, ponds / hot mud and fumaroles which have a temperature of 47 - 90⁰C. - Chloride waters have geothermal fluid equilibrium in the immature waters which is interpreted that the process is dominated by meteoric water and formed in a fluid forming environment in the form of riolytic and andesitic composition. It can be seen that the characteristics of surface manifestations are included in high temperature systemic manifestations. Fluid equilibrium in MNA-5 wells is in partial equilibrium which has a temperature of 260⁰ C so that it can be categorized as a high-temperature convective geothermal system with liquid domination. The "Patriot" geothermal system is interpreted by conducting petrographic analysis based on cutting and cores accumulated into mineral distributions that can be interpreted that the "Patriot" geothermal system has the characteristics of past and present reservoir temperature traces which are characterized by the presence of adularia, anhydrite, epidote, and mineral illite that forms at high temperatures and has an acidic pH and presence at different depths. So that based on data on mineral distribution of MNA-5 and MNA-23 wells there were three alteration zones consisting of the zone of argectic hematite + hematite alteration type, propylytic alteration zone chlorite + calcite + anhydrite so that the two zones can be interpreted as capillary rocks (caprock ), and epidemic zones + ilit ± wairakit as propylitic alteration types which are interpreted as top reservoirs. The presence of diorite intrusion in the MNA-5 well is interpreted as a heat source and magma body