Yes. The nearest port is Skagway, Alaska, which is about 150 kilometres south of Whitehorse. There's also a port in Haines, Alaska. Neither of these ports have the infrastructure to deal with the export of wood products from Yukon, and the Haines port is 400 kilometres from Whitehorse.
The nearest railhead, which is what I think you were mentioning, is in Fort Nelson, B.C., which is 950 kilometres from Whitehorse. That's a railhead.