There is the North Branch of the Potomac. The best trout water is the in the Catch and Release section below the Jennings Randolph Lake and Dam.
You can access this section at Barnum, WV.

The current flow is at 121 cfs., good for wade fishing.
But, be warned, if they should happen to be releasing water from the dam, anything over 300 cfs can be treacherous.