There’s just one week left to pre-register for this year’s Knoxville Nationals 1/3 Marathon and Sterling Physical Therapy 5K. The third annual event will take runners on a tour of Knoxville including downtown, city parks and the Knoxville Raceway. The race will begin at Auld Park Saturday August 7th at 8am. Pre-registration fees are $35 for the 1/3 marathon and $20 for the 5K and will increase by $5 after the August 2nd deadline. Those who pre-register for the 1/3 marathon will receive a performance running shirt and t-shirts will be given to 5K entrants. Registration can be completed online at www.khsdfs.org or by mailing the form to PO Box 438 in Knoxville.