Mile races are fun. Fun as a participant (faster than a 5k, yet wholly manageable), and fun as a spectator (you can see things unfolding over the 4 laps but it’s long enough for a surprise ending). The Rose City Mile is scheduled for Saturday, June 29 at Duniway Track. Registration is $25 if you sign up by the 27th, or $30 day of race. The first heat will step off at 10a, starting with…