A Mapbook includes a set of 49 maps which show county-level patterns of angler participation across the Upper Great Lakes states, in PDF format. The maps show the number of anglers, numerical change ...

Take an underwater journey as researchers deploy sonar technology to map the lakebed to document organisms that call it home.

Here's How For over a century, the United States and Canada have worked in tandem to manage four of the five Great Lakes that straddle both countries: Superior, Huron, Erie, and Ontario.