The Appoquinimink River and Blackbird Creek, located in middle New Castle County, are the northernmost creeks of any length in Delaware. Sharing almost a common mouth, they enter the Delaware River just upstream of where it officially becomes Delaware Bay. Together, these winding tidal waterways offer over 23 miles of exploring plus extra miles from the many side channels. Put in right by the spillway of the dike that separates freshwater Noxontown Pond from tidewater. The first quarter mile can be shallow at low tide, at which time starting at Odessa is a better option. The river winds through narrow, marshy bottoms that are fringed by wooded higher ground and later downstream it flows through mainly open marsh. Be cautious of tidal rips through the piers of the Route 299 Bridge in Odessa.