If you're looking to get away for the weekend consider making a list of all of the state parks in your state. It's often fairly inexpensive to get a general pass that gives you access to all of them. They can offer a multitude of activities such as hiking, biking, running or even spelunking. Alternatively, you can avoid the traffic by kicking back and enjoying the scenery with an excursion on a train.
If you want to get your heart pumping you can drive a race car like the big boys at speeds over 165 MPH! Dale Jarrett Racing Adventure offers this thrill at racetracks throughout the south and southwest.