A century ride my husband and I participated in, had us use several bike trails. It was a beautiful Saturday. We had to go at least 15mph in order to finish on time, and it took me a while to realize most of the people on the trail at that time were not participating in that event. We went around a lot of people, and some were not too happy with use. Normally we don't use bike trails except for when road conditions are treacherous. I'm glad there ARE bike trails, but I think the accepted speed is 10mph, and that's slower than we usually average.