The Ohio Department of Natural Resources has released its 2026 dredging plan for Grand Lake St. Marys. For the first

Learn why gizzard shad are frozen in the ice on Grand Lake this winter.

This graphic compares one of Grand Lake’s worst years for microcystin levels (2015) with the most recent full year of data (2025).

Wright State University Lake Campus Biology Professor Dr. Stephen Jacquemin gives an update on 2025 wetland performance in the Grand Lake St. Marys watershed.

Troy Shively discusses Grand Lake St. Marys' migratory birds at the February 2026 Lake Improvement Association member meeting.

Mercer SWCD's annual tree seedling sale is underway. Order by the March 6, 2026 deadline. View the flyer for more info. 

A new $2.54 million mixed-use building will be built at Grand Lake St. Marys State Park.

Theresa Dirksen and Dr. Stephen Jacquemin were receipients of the 2025 Guardian of the Lake Award.

ODNR Wildlife Research Technician Neil Baker discusses beavers, muskrats, and other Grand Lake furbearers.

Theresa Dirksen presents on ag and natural resources.