I had been meaning to check out the C&O Canal towpath ever since I moved to Washington, D.C., a few months ago. The C&O (officially known as the Chesapeake & Ohio Canal National Historic Park ) is a bit of a treasured icon in these parts, and all my biking and hiking buddies had their own favorite C&O story to tell. Starting out in historic Georgetown, the C&O Canal towpath follows the, you guessed it, C&O Canal, as well as the Potomac River, hugging these two waterways for...