With a population of nearly 190,000, the city of Grand Rapids is the largest in western Michigan and the second-largest in the state (only Detroit has more residents). As such, it's also one of the state's largest GLBT hubs, and it's also the closest large city to arguably the most prominent gay resort enclave in the Midwest, the twin towns of Saugatuck and Douglas, which overlook a beautiful stretch of sand on Lake Michigan.
In Mid-June, the city of Grand Rapids plays host to the increasingly well-attended Western Michigan Gay Pride Festival, which draws GLBT folks locally as well as from nearby communities like Holland, Muskegon, and of course Saugatuck. The date this year is June 14, 2014. Now in its 25th year, the festival is held at downtown's Calder Plaza, from 1 pm until 10 pm. It's preceded by the Western Michigan Gay Pride Parade, which takes place downtown from noon until.
Additionally, gay-popular bars as well as restaurants, hotels, and shops in Grand Rapids as well as out in Saugatuck will likely have a bit more going on that weekend. Check local gay papers, such as Metra Magazine and Between The Lines/Pride Source for details. Also take a look at the useful travel site produced by the city's official tourism organization, the Grand Rapids Convention & Visitors Bureau. If you're headed to the Saugatuck/Douglas region, check out the wonderfully helpful Saugatuck and Douglas Gay Travel Site, and for more travel info, visit the Saugatuck/Douglas Visitors Bureau site.