I live up in Northern Virginia, but I’ve used RidewithGPS to join the Richmond Area Bicycle Association (zero cost) to access their route library. 150 routes from 5 to 100 miles.
I find this to be a great tool for route identification and design. It’s the one my local clubs all use for route dissemination as well. You have to pay for the fancy features, but even the 100% free version is pretty darn awesome.