This is the third hike in the perimeter hike series in Patapsco Valley State Park.  Join us on an 11-mile circuit hike on seldom used trails in Baltimore and Howard Counties from Oella, down river to Ilchester and back through Ellicott City. The hike has numerous stream crossings and steep but relatively short climbs with a total elevation gain of 1350 ft. Our pace while hiking will average 2.0-2.5 mph.