Knoxville Dollars for Scholars is hosting the 3rd Annual Knoxville Nationals 1/3 Marathon and Sterling Physical Therapy 4K, being held Saturday morning at 8 a.m. and presented by the Pella Rolscreen Foundation. Race director Joe Cunningham says all proceeds from the races will go towards scholarships for local graduates. The race begins at 8 a.m. at Auld Park, and the KNIA/KRLS Big Red Radio will be playing music at the event.