Clay Walker will take part in a 150-mile bike tour this weekend in Texas to raise funds for the National Multiple Sclerosis Society. His ride starts Saturday (April 16) in Houston and concludes the next day in Austin following an overnight stay in LaGrange. In addition, some riders will begin in the town of Katy and ride to Austin. Gov. Rick Perry will also participate. "Riding a bike outdoors is the best way to get cardio, especially for someone who has MS," said Walker, who was diagnosed with the disease in 1996. "Personally, I think it's the most fun way to exercise."