I know that many runners usually don’t train well enough, get injured or change their minds and end up selling their numbers. Check the message boards onwww.robiecreek.com if that interests you too. I’ve heard that most of the time, if you try all of those avenues, you can get in somehow.
Here’s a link to the sign up for the Famous Potato Half and Full Marathon http://www.ymcatvidaho.org/index.cfm?ID=98,4,9
It’s May 15th this year.