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Lake-St-Marys is a reservoir and state park located in west-central Ohio. The official geographical name of the lake is Grand Lake, but it's also known as Grand Lake St. Marys State Park. Lake St. Marys was originally constructed as a feeder reservoir for the Miami-Erie Canal. At 13,500-acres, it was recognized as the largest man-made reservoir in the world for many years. It's also one of Ohio's first state parks, opening in 1949. Lake St. Marys is open year round and offers swimming, boating, fishing, hiking, picnicking and camping. The park is located along a major migratory route for birds and supports geese, loons, ducks, egrets, herons, cormorants and ospreys. Bald Eagles also nest in the Grand Lake St. Marys Wildlife Refuge, which is located on the southwestern corner of the lake. A miniature golf course and bike rentals are available in the park, and boats of unlimited horsepower are allowed on the lake. Seasonal dock rentals are available and several launch ramps are along the shoreline. The state wildlife refuge area, in the southwest corner, is off limits to all boats at all times. Four public swimming beaches are located at Lake St. Marys, but no lifeguard is on duty. In the wintertime, the park offers snowmobiling and cross-country skiing. Nearby attractions include the Miami-Erie Trail, which is part of a 47-mile statewide hiking trail, St. Marys Fish Hatchery and the Neil Armstrong Air and Space Museum, located in the town of Wapakoneta.

Surrounding areas: Grand Lake, Ohio (5.2 mi), Celina, Ohio (9.1 mi), Lima, Ohio (20.9 mi), Indian Lake, Ohio (26.5 mi)

Lake St Marys Vacation Rentals

Lake St Marys Hotels and Resorts

Hotels & Motels
S & W Motel1321 Celina RdSaint Marys, OH (419) 394-2341
Amerihost Inn St Marys1410 Commerce DrSaint Marys, OH1.4 mi.(419) 394-2710
Comfort Inn1421 Rt 703 ECelina, OH9.1 mi.(419) 586-4656
Holiday Inn Express Celina2020 Holiday DrCelina, OH9.1 mi.(419) 586-4919
Holiday Inn Express1008 Lunar DrWapakoneta, OH11.9 mi.(419) 738-2050
Super 8 Motel1011 Lunar DrWapakoneta, OH11.9 mi.(419) 738-8810
Travelodge413 Apollo DrWapakoneta, OH11.9 mi.(419) 739-9600
Knights Inn2285 N Eastown RdLima, OH20.1 mi.(419) 331-9215
Comfort Inn1959 W MichiganSidney, OH20.1 mi.(937) 492-3001
Fairfield Inn Lima2179 Elida RdLima, OH20.4 mi.(419) 224-8496
Sidney Holiday Inn400 Folkerth AveSidney, OH20.4 mi.(937) 492-1131
Wingate In150 W Market StLima, OH20.7 mi.(419) 228-7000
Wingate Inn Lima175 W MarketLima, OH20.7 mi.(419) 228-7000
Days Inn Motel1250 Nuebrecht RdLima, OH20.9 mi.(419) 227-6515
Travelodge1430 Bellefontaine AveLima, OH21.2 mi.(419) 227-2221
Hampton Inn1600 Hampton CtSidney, OH21.6 mi.(937) 498-8888
Sidney Holiday InnI-75 & SR 47Sidney, OH21.6 mi.(937) 492-1131
Arrow Motel718 E 5TH StDelphos, OH21.7 mi.(419) 692-0786
Hampton Inn1933 Roschman AveLima, OH21.7 mi.(419) 225-8300
Holiday Inn Lima1920 Roschman AveLima, OH21.7 mi.(419) 222-0004
Comfort Inn1210 Neubrecht RdLima, OH22.5 mi.(419) 228-4251
Econo Lodge Of Lima1201 Neubrecht RdLima, OH22.5 mi.(419) 222-0596
Motel 6 #5861800 Harding HwyLima, OH25.4 mi.(419) 228-0456
Ramada Inn3600 East Bluelick RdLima, OH25.7 mi.(419) 221-0114
Holiday Inn Express840 N Washington StVanwert, OH25.7 mi.(419) 232-6040
Days Inn8200 N Washington StVan Wert, OH25.8 mi.(419) 238-5222
Knights Inn9060 Country Club RdPiqua, OH27.1 mi.(937) 773-6275
Howard Johnson902 Scott DrPiqua, OH28.1 mi.(937) 773-2314
Laquinta Inn950 E Ash StPiqua, OH28.2 mi.(937) 615-0140
Comfort Inn987 E Ash StPiqua, OH28.3 mi.(937) 778-8100

Lake St Marys Weather & Climate

Northwest Ohio's climate is humid continental according to the Koppen Climate Classification. The region experiences four distinct seasons with warm, humid summers and cold to frigid winters. Snowfall varies greatly year to year. Some years will see very little in the way of snow accumulation, while other years, blizzards are not uncommon. Thunderstorms and tornadoes are another possibility, especially in spring and summer. Spring weather in Northwest Ohio is very unpredictable and often cool and rainy. Autumn is the sunniest time of year with mild temperatures, which results in beautiful fall foliage. A jacket is recommended for fall evenings that can dip into the upper 30s to low 40s. It's best to always check ahead when traveling to Ohio to make sure you have the proper attire as the weather is changeable.

     Month       High Temp   Low Temp   Rainfall   Ocean Temp 
January 32°F 17°F 1.84 in. -
February 37°F 21°F 1.72 in. -
March 49°F 30°F 2.41 in. -
April 61°F 39°F 3.36 in. -
May 72°F 50°F 3.73 in. -
June 81°F 59°F 3.97 in. -
July 84°F 63°F 4.49 in. -
August 82°F 61°F 3.52 in. -
September 76°F 54°F 2.67 in. -
October 64°F 43°F 2.26 in. -
November 50°F 34°F 2.86 in. -
December 37°F 23°F 2.30 in. -

Lake St Marys Map & Transportation

Main viewing image.
Click each thumbnail image to enlarge.
The closest airports in the area are the James M Cox Dayton International airport (DAY) located about 44 miles south of Lake St Marys in Dayton, Ohio, the Findlay airport (FDY) located approximately 50 miles northeast of Lake St Marys in Findlay, Ohio, the Fort Wayne International airport (FWA) located roughly 51 miles northwest of Lake St Marys in Fort Wayne, Indiana, the Springfield Beckley Municipal airport (SGH) located around 56 miles southeast of Lake St Marys in Springfield, Ohio, and finally Delaware County Johnson Field (MIE) located about 56 miles west of Lake St Marys in Muncie, Indiana.

Lake St Marys Attractions

Amusement and Theme Parks
Putt N' Pond Speed ParkFostoriaOH66.8 mi.
LeSourdsville Lake Amusement ParkMiddletownOH70.6 mi.
Wyandot LakePowellOH74.4 mi.
Paramount's Kings IslandKings MillsOH81.8 mi.
Fun SpotAngolaIN82.1 mi.
Stricker's GroveRossOH85.7 mi.
Adventureland Amusement ParkNorth WebsterIN87.1 mi.
Water Parks
Wyandot Lake Amusement & Water ParkPowellOH74.4 mi.
The Beach WaterparkMasonOH81.4 mi.
Parky's Pirate Cove/Miami Whitewater ForestCincinnatiOH95.0 mi.
Surf Cincinnati Water ParkCincinnatiOH95.0 mi.
Soak City Water ParkSanduskyOH108.3 mi.
Mohican WaterslideLoudonvilleOH113.7 mi.
Golf Courses
Foxs Den Golf ClubCelinaOH9.1 mi.
Mercer County Elks Country ClubCelinaOH9.1 mi.
Northmoor Golf on the LakeCelinaOH9.1 mi.
Moose Golf CourseSidneyOH22.0 mi.
Shelby Oaks Golf CourseSidneyOH22.0 mi.
Stillwater Valley Golf Club at VersaillesVersaillesOH22.3 mi.
Prairie View Golf ClubWaynesfieldOH22.8 mi.
Woods Golf ClubVan WertOH24.3 mi.
Hawthorne Hills Golf CourseLimaOH24.6 mi.
Delphos Country ClubDelphosOH25.5 mi.
Moss Creek Golf ClubClaytonOH26.8 mi.
Colonial Golfers ClubHarrodOH27.4 mi.
Ski Areas
Mad River MountainZanesfieldOH40.3 mi.
SnowtrailsMansfieldOH99.8 mi.
Perfect North SlopesLawrenceburgIN102.8 mi.
Swiss ValleyJonesMI119.2 mi.
State Parks
Grand Lake State ParkOH4.9 mi. 
Harbor Point State ParkOH7.0 mi. 
Fort Amanda State ParkOH11.9 mi. 
Lake Loramie State ParkOH12.1 mi. 
Fox Island State ParkOH27.6 mi. 
Indian Lake State ParkOH28.5 mi. 
Treaty Of Greenville State ParkOH31.9 mi. 
Kiser Lake State ParkOH33.2 mi. 
Ouabache State ParkIN39.0 mi. 
Bicycle Museum of AmericaNew BremenOH7.0 mi.(Technology)
Mercer County Historical MuseumCelinaOH9.1 mi.(History)
Fort Recovery State MuseumFort RecoveryOH21.7 mi.(History)
Museum of the SoldierPortlandIN31.3 mi.(Miscellaneous)
Johnny Appleseed MuseumUrbanaOH45.0 mi.(History)
U.S. Air Force MuseumDaytonOH54.8 mi.(Technology)
United States Air Force MuseumDaytonOH54.8 mi.(Technology)
Dayton Art InstituteDaytonOH54.8 mi.(Art)
Joseph Moore MuseumRichmondIN55.4 mi.(History)
Wayne County Historical MuseumRichmondIN55.4 mi.(History)
Richmond Art MuseumRichmondIN55.4 mi.(Art)
Lincoln MuseumFort WayneIN56.1 mi.(History)
Ball State University Museum of ArtMuncieIN57.2 mi.(Art)
Zoos and Aquariums
Fort Wayne Children's ZooFort WayneIN56.1 mi.
Columbus ZooColumbusOH83.8 mi.
Toledo Zoological GardensToledoOH89.4 mi.
Cincinnati Zoo and Botanical GardenCincinnatiOH95.0 mi.
African Safari Wildlife ParkPort ClintonOH101.6 mi.
Indianapolis ZooIndianapolisIN107.1 mi.

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