Access from Route 13 from Onancock is via Routes 178 and 179. Route 655 west of Onancock will take you to the general area to a boat ramp on the north shore of Onancock Creek and the only possible land access to the marsh. This 5,775 acre area is located on Pocomoke Sound in the northwest portion of the county on bayside. The area consists mainly of tidal marsh interspersed with hammocks of pine and oak. The water surrounding the area is tidal brackish, ranging to fresh in the upper reaches of the creeks.
Black ducks breed on the area as do a wide variety of marsh and song birds.
Numerous species of waterfowl winter here and many others can be seen during migrations, including loons, grebes, mergansers, goldeneyes, buffleheads, oldsquaws and Canada geese. Deer, rabbits, muskrats, red foxes, raccoons, opossums, mink and river otter can also be found. Its possible to walk parts of the marsh during low tides up to some of the creeks, otherwise the road through the area is some distance from water. The marsh also provides opportunity to see a variety of marsh plants. About 2,500 acres, known as Michael Marsh , is set aside as a refuge, but has only boat access.