DescriptionNorth West Company trader and explorer David Thompson, for whom these lakes are named, mapped this northwestern corner of Montana between 1808 and 1812, providing a detailed map of the region for exclusive use by the British fur companies operating out of Canada. Upper, Middle, and Lower Thompson lakes are now part of the Thompson Chain of Lakes, consisting of 18 lakes and dozens of campgrounds, including those at Logan State Park on Middle Thompson Lake.Personal NamesThompson, DavidOther Name(s)Thompson Chain of LakesContributing InstitutionMontana Historical Society Library and ArchivesGeolocation[1] Elevation3331 ft. CountyLincoln County