Oak Openings Nature Preserve is 73 acres of protected open space in Grayslake providing year-round recreation opportunities, local trail connections, and chances to explore a variety of native landscapes. Hidden among the oak groves of the preserve is the quiet Ryan Pond, with a simple shore line perfect for a picnic. As you venture along the Casey Trail, you will notice a shallow creek carving through the trees to the north of the trail — this is Bulls Brook. This creek empties into Ryan Pond, a site protected in Illinois as a Land and Water Reserve.
The Casey Trail passes through Oak Openings and connects to a 12+ mile local trail system. Signage provides additional site and trail information, and dog waste bags are available at the trailhead. There is a portable restroom located in the parking area.