Selkirk is a hamlet in the town of Bethlehem, Albany County, New York. It is located south of the city of Albany, it is an exurb of that city. A major freight railyard operated by the Selkirk Subdivision of CSX Transportation is located there; all of the CSX freight traffic going to or from Boston goes through Selkirk on its way to points north, south or west. The route is also used by traffic from New York City to points west, a detour known as the Selkirk hurdle. Also in Selkirk is Audubon International, a non-profit environmental educational organization.