Pierson Reservoir   Be the first to submit input for Pierson Reservoir. If you have info on Pierson Reservoir, Washington County, Oregon please submit it here to improve this web site.          These outdoors activities are available near Pierson Reservoir.   Lakes Near Pierson Reservoir: Henry Hagg Lake, Washington County, 10 miles away Bastion Reservoir, Washington County, 10 miles away Timothy Lake, Clackamas County, 18 miles away   Public Lands Near Pierson Reservoir: Bald Peak State Park, Oregon, 3 miles away Maud Williamson State Park, Oregon, 17 miles away Willamette Mission State Park, Oregon, 19 miles away Fort Clatsop National Memorial, Astoria - OR, 64 miles away   Marinas On or Near Pierson Reservoir: Happy Rock Moorage, Portland, 17 miles away Rocky Pointe Marina, Portland, 17 miles away Brown's Landing, Scappoose, 19 miles away Marina Way Moorage, Portland, 19 miles away Fred's Marina, Portland, 19 miles away   Camp Grounds Near Pierson Reservoir: Washington County Fair Grounds, Hillsboro, 8 miles away   Hotels Near Pierson Reservoir: Best Western University Inn & Suites, Forest Grove, 3 miles away Americas Best Value Inn And Suites Forest Grove, Forest Grove, 4 miles away Econo Lodge Inn & Suites Hillsboro, Hillsboro, 7 miles away Dunes Motel, Hillsboro, 7 miles away Comfort Inn Conference Center, Hillsboro, 9 miles away