there's plenty of riding all within 1/2 hour drive - give or take 10 minutes.
1. six mile (there are some water crossings here you can't avoid - so just make note of that with your footwear choice). fun, twisty, flat. probably your closest option.
2. the sourlands is a bit of drive, but really really technical. one of my favorites.
3. chimney rock is a great ride too. cross country fun.
4. and hartshorne and allaire.