Boat Busters of Grand Lake (Video)

Meet Chris Monroe & Andrew Vogel - the Boat Busters of Grand Lake.

Natural Resources Update June 2026 (Video)

Grand Lake natural resources updates wtih Theresa Dirksen.

Study: Water Quality Improvements from Prairie Creek wetlands

Wright State University-Lake Campus professor Dr. Stephen Jacquemin, Mercer County Ag & Natural Resources Director Theresa Dirksen, and colleagues recently

Latest Microcystin Levels

Latest microcystin numbers from Grand Lake St. Marys (from 5/6/2026).

May 2026 Water Quality Update (Video & PPT)

Wright State University-Lake Campus Biology Professor Dr. Stephen Jacquemin provided a water quality update at the May 2026 LIA meeting.

VIDEO: Grand Lake Rec Club President Brad Fisher

Grand Lake Recreation Club President Brad Fisher gave a presentation about the Rec Club’s lake projects at the May 2026

Knowledge Base

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

LIA Educational Series

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

Minutes

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

Photo Gallery

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

Bar Stool Open: August 8

4-person team mini golf tournament at the bars on Grand Lake!

Water Quality Update

View the latest water quality updates, courtesy of Dr. Stephen Jacquemin.

Upcoming Events

Bar Stool Open 2026