Hennepin County

Where Found: 

Located in Minneapolis on the northwest shore of Lake Harriet, at West Lake Harriet Boulevard and William Berry Road

Text On Markers: 


The continental glaciers spreading over Minnesota during the great ice ages brought vast quantities of rock material from the north to be dumped indiscriminately during the recession of the ice. Old river valleys were filled and belts of hills were formed as conditions changed. The Lake Harriet landscape has such an origin.

Leaving the present channel of the Mississippi River at the Plymouth Avenue bridge, a pre glacial valley runs almost directly south beneath Lake of the Isles, Lake Calhoun and Lake Harriet to the Minnesota River at Bloomington. This valley was mostly filled but not completely obliterated by glacial deposits. The unfilled portions of the valley are now basins, which are filled by lakes perched high on the glacial debris. Lake Harriet lies directly over this ancient valley, its surface 250 feet above the valley's rocky floor, and is in a setting of hills piled up while the ice front paused here in its final retreat about 10,000 years ago.

Erected by the Geological Society of Minnesota and the Board of Park Commissioners, City of Minneapolis aided by a grant from the Louis W. and Maud Hill Family Foundation. 1955

Marker Number: 



Metro Region

Marker Location: 

LAKE HARRIET REGION Minneapolis 44° 55' 39.6984" N, 93° 18' 31.2984" W

Date Update: 

Monday, February 27, 2017

Information Needed: 

  • Marker Images

Condition of Marker: 

  • Good

Marker Made Of: 

Stone with Bronze plaque

Do it yourself Region: 

Metro Area


Done -