My husband and I have been training for Grandma's Half Marathon which is a 13.1 mile race. One might say "you're running a distance race, what is a 5K going to do for you"? LOTS! It helps with speed. Every race is a race against the clock, so while building stamina is important in a half marathon, so is speed. We call it a tempo run and a 5K is the perfect way to get your tempo run in for the day while you're contributing to a great cause in the community.