Naming your event can be so much fun, but it should also be taken very seriously. I will not be naming any names in this posting. This is just a word to the wise. If the name of your run is similar to the name of one of the for profit companies that organizes runs all over the world, you could easily have a lawsuit on your hands.
Once you have decided on a name, make sure the name has not been trademarked. If you are planning on having an annual event, it is also a good idea to trademark your event name. Try to give your event a name that is unique and/or specific to your organization. Here is one example of some folks who know how to name an event:
Cowboy Color Chase 5K Walk/Run
Be sure to check them out!