Oklahoma Maps Map of Foss Lake, OK Go to Google Map of Foss Lake. https://maps.google.com/maps?oe=utf-8&client=firefox-a&q=foss+lake&ie=UTF-8&hq=&hnear=0x87a9550b26dbe26d:0x5da6b165356dd4b6,Foss+Reservoir&gl=us&ei=QBXoUo7