5k Running Chart
There's a great chart over on gottfriedville.net which shows you what your minute per mile should be to reach the target 5k time. If I want to run the 5k in 27 minutes, I need to run at least a 8:41 minute mile.
If your running the JP Morgan's Corporate Challenge in Boston, this isn't a true 5k as the course is 3.5 miles long. A real 5k is 3.11 miles.
If I want to run the JP Morgan's Corporate Challenge in Boston in 27 minutes, I have to run a 7:42 minute mile at 7.78 miles per hour.