Home>>Birding>>Site Guides>>Patapsco Valley State Park>>Avalon/Orange Grove Avalon/Orange Grove Photographs Enter from US1 to South Street into the park past the historic Thomas Viaduct. Visit the Baltimore County section: Jo Solem Jo Solem Jo Solem Jo Solem Jo Solem Visitor’s Center, Lost Lake, site of Bloede Dam (removed in 2018-2019), and the Grist Mill Trail as far as the bridge at Ilchester Road. Scott Berglund Scott Berglund Scott Berglund Scott Berglund But emphasis is on Howard County in the Avalon and Orange Grove Sections along River Road. Scott Berglund Jo Solem Jo Solem Jo Solem At the end of the publicly-accessible road is the Swinging Bridge. Also visit the Cascade Falls Trail. Jo Solem Scott Berglund Jo Solem Jo Solem