The Roanoke Valley is an awesome place to ride a bicycle. Cycling is becoming more and more popular and I don't see a decline anytime soon, especially with gas prices the way they are.
I know people who commute to work on bicycles and then join the local bike club for a recreational ride on the weekend. More power to you!

Speaking of the local bike club, here's a link to the Blue Ridge Bicycle Club:
http://www.blueridgebicycleclub.com/

Membership is now strong for the club, after a few years of decline. They offer rides for just about every skill level. The web site has a ride calendar that shows the distance, skill level and meeting time and place for the rides.

I think many would agree that Botetourt County is the best area to ride in the Roanoke Valley. Is has picturesque countryside and rolling hills. As a matter of fact, the transcontinental bicycle route passes through the county. That's what the "Bike 76" signs are all about, in case you were wondering. The Tour duPont cycling race came (quickly, I might add!) through the county for several years.