I like doing 5 and 10ks for fun, except for the fats. It's annoying to get pushed towards the back and then have to dodge around the lumbering "walkers," (more like waddlers) just to be able to actually run. Most races don't do corrals for those distances but there really should be a way to submit time so they can split it up into "will finish within 30min/one hour" and "just here for free Gatorade."