Part of the Forest Preserves of Cook County, Beck Lake features 40 acres of grassy expanse for your pooch to run and play off leash. There is also a large pond and outdoor shelter, as well access to 9 miles of trails (your canine will need to be on leash if you hike). To use the Forest Preserves off leash area, you must purchase an annual membership, which is $60 annually per dog for residents and $120 for nonresidents.