Wellesley Island State Park is 2600+ acres including a marina with boat rentals, four boat launch sites, a swimming beach and picnic area,  concession (pictured at upper left), natural sand beach and a lot of beautiful  shoreline.  12 Carry in sites, 10 winterized cabins, 12 full service cottages, 435 campsites, 115 trailer sites (electric only), 57 full hook-up. Slip dockage. Picnic areas.
There are rustic cabins, full service cabins, RV sites,  and regular camping sites.
Other amenities include a miniature golf course and playgrounds.
 Above at right  is the main marina.

Minna Anthony Common Nature Center
Located within Wellesley Isl. State Park,
the Nature Center offers a museum and gift shop,  8 miles of  beautiful hiking/skiing trails, a Butterfly House and Voyager Canoe tours during July and August.   Pictured at right is the vista as you walk toward the main museum building.
Click here for a list of special events at the Nature Center.