Directions:  Backtrack up the hill (Old Browns Hill Road) to Browns Hill Road, turn right and bear right at the intersection onto Beechwood Boulevard. Follow Beechwood all of the way through Frick Park and straight at the South Dallas Avenue stop sign after which it bears right then crosses Forbes Avenue. Continue on Beechwood to its end at 5th Avenue. Turn right onto 5th, then straight at the Penn Avenue traffic light. Continue straight through all lights, the road becomes Washington Boulevard. Follow Washington Boulevard to its end at Allegheny River Boulevard. Go straight at this intersection and bear left across the railroad tracks. Follow the road, which ends at the Army Corps of Engineers office building and lock. There is a parking area about half way down the road. The Herring Gull colony mentioned in the introduction is here. This is also a good place to observe Common Nighthawks in migration. To the left and below the dam is 6-Mile Island. The trees at the downstream end of the island attract hundreds of Double-crested Cormorant in April.