Millennium Park reclaims 1,500 acres to become an urban greenway that will link the four cities of Grand Rapids, Walker, Wyoming and Grandville. When complete (scheduled for 2014), The Park will contain more than 1,800 acres of greenspace, 8 miles of walking and hiking trails, and a 10-mile multi-use trail along the Grand River waterfront, making it one of the nation's largest parks in an urban setting.

Projected to be the largest park in the nation, Millennium Park reclaims industrial land for public use, restores depleted gravel pits into recreational areas, improves public access to the Grand River waterfront, provides regional active and passive recreational facilities and protects 2,000 year old, sacred Native American burial grounds.

Millennium Park is a greenway connecting urban Johnson Park with John Ball Zoological Park, a county owned zoo. The park provides direct access to 5 miles of the Kent Trails, a 15-mile regional trail that runs through it. This non-motorized trail connection makes it possible to safely enter the park without driving or walking along roadways.

The master plan contains numerous nature and bicycle trails, playgrounds, campgrounds, bikeways, walkways, bicycle facilities and beaches providing diverse opportunities for physical activity.