Grand Lake St. Marys State Park to Get New $2.5M Facility

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

Dirksen and Jacquemin Named Guardians of the Lake

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.

Dr. Stephen Jacquemin presents on water quality.

LIA Trustee Brian Miller gave a wetlands and natural resources update provided by Mercer County Ag & Natural Resource Director

The Lake Improvement Association knowledge base features reports, data, statistics, action plans, and more learning resources.

Welcome to the Lake Improvement Association's Education Series. View each installment to learn more about Grand Lake St. Marys.

Minutes from the monthly LIA Member Meeting, held at 10 a.m. every first Saturday of the month at the Celina Moose.

Check out fun photos from past Lake Improvement Association events! Find your own photos - and photos of your friends!