The Covenant Health Knoxville Marathon is an annual weekend-long event with a health and fitness expo and five different running events: 26.2-mile marathon, 13.1-mile half-marathon and four-person marathon relay. The Kids Run and 5K will be held Saturday, March 26, at 4:30 and 6 p.m., respectively. The race course showcases many of Knoxville’s scenic neighborhoods. The event is free for spectators.