I did the Tour of Richmond last year....if you're in decent shape, you'll be fine on the 60 mile route. I did the 100 mile route and it was one of the easier centuries I've done because it's pretty flat with no notable hills. Also, there are plenty of food stops, so you can stop and rest as needed. The other nice thing is that Richmonders seem to be total wimps when it comes to even the smallest of hills, so it's kind of an ego boost when you blow by people struggling to downshift and/or dropping their chains on little rollers.