My wife and I rented bikes from Barb's bikes in Dennis. The shop is right next to the bike path and at the end of the trail. Consequently it was a simple matter to head eastwards.
The trail is very simple to follow and, unusually for the US, is very well signposted. It crosses a road every mile or so but the crossings are very straightforaward. As there is only one fork in the trail, a few miles from Dennis, there are only two options of direction to ride: east or north. As we're getting on in years, we chose the shorter branch to Chatham.
The old railway is well surfaced so the trail is excellent to ride on. The way is mostly flat with only the occasional slope. It could not be much easier to ride on. Even at our ages we had covered 20 miles before we began to feel it.
Unfortunately there is very little to see. Having ridden on several bike trails, compared to others there are no views, nothing of interest and no history along the trail. The route is often hemmed in by trees and all you can see is fields, houses and light industry units. Chatham is a charming, elegant and pristine town - but we had already spent an afternoon there. As a result we got bored before we got tired.
All in all, a pleasant couple of hours, and the exercise was welcome after a long flight but, although the trail is excellently constructed and easy to ride on, the route is bland and far from the best.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.