Video: Charles Mears State Park, Pentwater, Michigan, is an ideal spot for a Northern Michigan vacation that celebrates the outdoors. Set up camp, spread a towel on the sandy Lake Michigan beach, hike up old baldy, cast a fishing line in the surf or wander into the nearby charming resort town of Pentwater to eat and shop. This video of a day in Charles Mears State Park, Pentwater is a glimpse of the beach fun that awaits.