About the Grand Lake St. Marys, Ohio Area 

Grand Lake St. Mary's Grand Lake St. Mary’s is located in both Auglaize & Miami Counties, and is only a short distance away from the major metropolitan areas of Lima & Dayton Ohio.

One of the worlds largest man made lakes, Grand Lakes St. Mary’s was constructed years ago for the purpose of being a feeder for the Miami-Erie Canal but since has become a major attraction.  Today the beautiful Grand Lake is the “hub” for recreation providing year round enjoyment for all, the young and young at heart  With nearly 14,000 acres and 52 miles of shoreline, discover the many opportunities for vacationing, picnicking, swimming, boating, & more.

Calling are boaters!  Grand Lake St. Mary’s is open-zoned for skiing, has unlimited horsepower, and only requires that boaters use caution and obey the 300 ft. no-wake along banks and shorelines.  There are a total of five state ran boat launching ramps and a multitude of other launching availabilities dotting the Auglaize & Miami County areas. 

Calling all anglers!  “Fishing is a year round affair” at Grand Lake St. Mary’s.  On an average the lake is relatively shallow with depths ranging from seven to nine feet, however there are areas increasing in depth.  Attracting a number of anglers, local and coming from afar, the catch of the day may include large mouth bass, crappie, perch, significantly sized catfish & walleye, to even the childhood favorite – playful bluegill.

Open to the residents or visitors, the Grand lake St. Mary’s State Park located in Auglaize County along St. Rt.703, welcomes campers all year round.  The campground offers a total of 210 campsites available with or without electric, a group tent area commonly used by boy scout and girl scout troops, 3 camper cabins semi furnished plus 2 cedar cabins furnished with a living room, kitchen, bedroom(s), and bath.   Camping fees vary in rate depending on your length of stay and electric-non electric sites.  Camper cabins are $35.00 a night and cedar cabins are $80.00 a night.  For information, you can contact either the park office at (419) 394-3611 or dial 1-866-OHIO PARKS for reservations.  On-site amenities (some seasonal) include restroom and shower facilities, laundering facilities, a miniature golf course, sand volleyball court, bicycle rental, a nature center, playground equipment, boat ramps and tie-up docks, and a beach for splashing good time!

Get Involved - "Together We Can Make A Difference"


The Lake Improvement Association, (LIA) also called the Lake Restoration Committee is a group of members serving to work together with area residents, farmers, park, and other lake officials to maintain the preservation of Grand Lake St. Marys's.

Community Links

Annual Event Venues & Information

 *  Zuma Days Festival June 15th - June 16th
 *  Rockford Community Days June 15th - June 16th
 *  Fort Recovery Harvest Jubilee June 15th - June 17th
 *  Celina Freedom Day Festival June 29th - July 1st
 *  Celina IC Parrish Festival July 20th - July 22nd 
 *  Celina Miss Lake Scholarship Pageant July 23rd
 *  Celina Lake Festival July 27th - July 29th
 *  Mercer County Fair August 7th - August 13th
 *  2007 Governors Cup Regatta August 25th - August 26th
*  Grand Lake Mariners 2013Home Schedule
Cyndie Scott
Cyndie Scott
6992 Laketree Court Celina OH 45822