Hidden Valley Park Hidden Valley Park borders the Grand River below a spectacular, exposed 360 million year-old Chagrin Shale cliff. Views of the wide, scenic river are visible from a flat, riverside trail. Trees along the river and trail display evidence of busy beavers. This park offers visitors excellent access to the Grand River. http://www.lakemetroparks.com/select-park/hidden-valley.shtmlAll Images © Copyright J.DELL Photography 2008-2009 ALL RIGHTS RESERVED