This weekend I went for an excellent bike ride on the C&O Canal tow path from Paw Paw down to Little Orleans and back. The weather was excellent - mid 60s and sunny. Most of the path was under the shade of trees. It was just under a 2 hour drive from Ashburn out to Paw Paw, WV. We stopped there at the Liberty Gas station just before the bridge over the Potomac River to use the facilities and get a few bottles of water. Then we headed across the bridge to park at the camping area parking lot just south of the Paw Paw Tunnel.
All in all, we rode about 31 miles with only about 150 feet of elevation gain. It took us 2 hour 30 minutes to ride from Paw Paw down to Little Orleans. Riding back from lunch only took us 2 hours 18 minutes. I suspect the reason it was quicker coming back was because we spent more time stopping to look at the tunnel and the locks and scenery.