andyb on 7/9/2016 1:14:34 PM:
Yeah, the C&O canal and towpath sort of veer away from the river in Georgetown. You have to know when to cut over to the Capital Crescent trail (Fletcher's boathouse (mile 3) is a good cutover, although a bit cheating as it gives you pavement for the last three miles). Then you ride under the Key Bridge along the G'town waterfront, walk your bike the last couple tenths through all the woozy partiers, across the front of Thompson's boathouse, and then you'll see the little obelisk across a tiny footbridge. You must go over and touch it to complete your ride!