Megan Ramey May 8, 2017 Pittsburgh, Multi-Day Tour, Washington Great Allegheny Passage Trail and C&O Towpath Megan Ramey May 8, 2017 Pittsburgh, Multi-Day Tour, Washington 340 miles of dedicated car-free bike trails between Pittsburgh and Washington, DC, makes the Great Allegheny Passage and C&O Towpath the most desirable multi-day bike tour in the United States!