Not sure about the eastside of the state, but I live in Kalamazoo, and we got Bell's Brewery to visit, and the Kal-Haven State park (trail) Leads from Kalamazoo to South Haven which is on Lake Michigan (Great Beaches). Also just outside Kalamazoo is Fort Custer Recreation Area, LOTS of biking trails. From here, about 45 minutes north on US 131, Grand Rapids there's Yankee Springs state park, which has a lot of Biking trails, and 5 or so brewery's / brewpub's. Hope this helps!
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