West of Harker is Summerland Swamp , and to the East is the Okaloacoochee Slough .
Most maps indicate that Harker is located on State Road 29 between West Main Street to the North and Oil Well Road to the South .
Harker     is Summerland Swamp , and to the East is the Okaloacoochee Slough .
Most maps indicate that Harker is located on State Road 29 between West Main Street to the North and Oil Well Road to the South .