Congdon Park in Duluth in Saint Louis County, Minnesota — The American Midwest (Upper Plains)
Lake Superior
| | Glensheen Historic Estate | |
Photographed by Cosmos Mariner, June 24, 2024
1. Lake Superior Marker
Lake Superior is the largest of the Great Lakes by a lot. With a surface area of nearly 32,000 miles and areas as deep as 1,332 feet, Lake Superior could hold all the water in lakes Huron, Michigan, Ontario and Erie, plus three additional Lake Eries. That's approximately 3-quadrillion gallons of fresh water.
It's not all about size, though. Lake Superior serves to connect the heartland to the global economy via the St. Lawrence Seaway. This navigable channel flows between Duluth to the Atlantic via Quebec through a series of 15 locks. Opened in 1959, vessels following "Highway H2O" typically navigate the 2,038 nautical miles at about 10.4 knots (12 mph) in about 8.5 days.
The Duluth-Superior port ships over 32-million tons of cargo a year, primarily ore, coal and grain.
Did you know?
Smaller ships that can pass through the St. Lawrence Seaway's locks are known as "Salties," as they may travel to the Atlantic and beyond. Freighters too large to navigate the canal system ocean are locked within the Great Lakes and are called "Lakers."
Information courtesy of Minnesota Sea Grant, housed on the UMD Campus.
Erected by Glensheen
this page online
Topics. This historical marker is listed in these topic lists: Industry & Commerce • Waterways & Vessels.
Location. 46° 48.865′ N, 92° 3.078′ W. Marker is in Duluth, Minnesota, in Saint Louis County. It is in Congdon Park. It can be reached from London Road (Voyageur Highway) (State Highway 61) 0.2 miles north of South 32nd Avenue East, on the right when traveling north. The marker is located along the Glensheen Estate interpretive trail, overlooking Lake Superior. Walking access is from the Glensheen Estate parking lot on the northeast side of the property. Touch for map. Marker is at or near this postal address: 3300 London Road3300 London Road, Duluth MN 55804, United States of America. Touch for directions.
Regionally, this marker is in Minnesota’s Arrowhead Region and in the Iron Range. It is also in the American Midwest, on the Great Lakes, and in the Corn Belt. Globally, it is in North America, the Great North Woods, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what
Photographed by Cosmos Mariner, June 24, 2024
2. Lake Superior Marker
Looking southeast from the Glensheen Estate interpretive trail.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Tischer Creek (a few steps from this marker); Stone Bridge & Trails (within shouting distance of this marker); The Boathouse (within shouting distance of this marker); Glensheen Restoration (within shouting distance of this marker); The Landscape (about 300 feet away, measured in a direct line); Carriage House (about 300 feet away); Servant's Courtyard (about 300 feet away); Glensheen (about 300 feet away). Touch for a list and map of all markers in Duluth.
Another marker is no longer nearby. Boat House and Pier (was within shouting distance of this marker but has been permanently removed).
Related markers. Click here for a list of markers that are related to this marker. Glensheen The Historic Congdon Estate
Credits. This page was last revised on February 20, 2025. It was originally submitted on February 14, 2025, by Cosmos Mariner of Cape Canaveral, Florida. This page has been viewed 109 times since then and 12 times this year. Photos: 1, 2. submitted on February 18, 2025, by Cosmos Mariner of Cape Canaveral, Florida.
