EntityQ6921487· pop 5· linked from 219 articlesMount JeffersonSign in to savemountain in Centennial Mountains on border of Idaho and MontanaConnectionsUnited StatesCountryPacific OceanEntitymountainEntityThomas JeffersonEntityIdahoEntityMontanaEntityMississippi RiverEntitygeographic coordinate systemEntityGulf of MexicoEntitymountain rangeEntityMissouri RiverEntityColumbia RiverEntitysummitEntityFounding Fathers of the United StatesEntitySnake RiverEntityUnited States Geological SurveyEntitytopographic prominenceEntitytopographic mapEntityriver sourceEntityFremont CountyEntityCategoriesMissouri RiverMountains of Beaverhead County, MontanaMountains of Fremont County, IdahoMountains of IdahoMountains of Montana