Hike the North and South Beach Trail at Harrington Beach State Park

This state park is about a 30 minute drive north from Milwaukee on I-43. It has beach access along it's entire length, multiple hiking trails, and a great quarry lake that can be used for fishing, hiking, or general exploring.

From the parking lot, you can go and hike one two areas (of course they both meet up):

1. The North Beach
   1. Go straight east and follow the path toward the water from the parking lot for about 100 ft (that's it!)
2. The South Beach
   1. Follow the trail south toward Quarry Lake, and you will be greeted by a great pine forest, multiple picnic areas, and pit bathrooms.

You can take the beach trail all the way from the North Beach down to the South Beach, and then loop back on the paved woodlands trail back to the parking lot if you've had your fill of Lake Michigan. 

In the wintertime, Lake Michigan beaches are well known to freeze over and fill up with ice shelves, be extra careful not to get too close to freezing water for obvious reasons.