Got to spend some time at Great Falls on the Potomac this past week and man what a fun time!  I hadn't paddled there since college and I'd forgotten how much variety there is on that river.  Everything from beginner sections to Class V lines on the Falls plus scenic sections ideal for Stand Up Paddle Boards or Rec Kayaks.  The thing that struck me the most was how awesome it is to have a river resource like that so close to such a large city.  It's pretty wild to think that when you're…