An absolutely beautiful State Park! You can go swimming in Lake Michigan, the Big Sable river (which feeds from Hamlin Lake into Lake Michigan), and of course, Hamlin Lake. There are plenty of hiking trails, beaches, and sights to see here.
Great ice cream and food. Many an out of towners favorite ice cream spot.
A fun spot to grab a couple drinks - The Mitten is attached to another small bar called Barley + Rye as well as Sportsman's Bar and Grill. All 3 are great options!
The main beach in Ludington - one of the best beaches in the state (if you ask me).
A great playground and park right on the waterfront of Lake Michigan. Here you can watch the Badger come in and out and is also a great place to enjoy an ice cream cone while the kids play.