From a 2015 article in the local Los Alamos, NM newspaper:
"Los Alamos' own Miss Northern New Mexico 2015 will be bringing "Beauties for Big Brothers Big Sisters" to this year's Fire and Ice Festival in Jemez Springs."
"Come out to Fitzgerald Park 10 a.m. to 5 p.m. Saturday and purchase your chance to toss a pie at Miss Northern New Mexico, as well as other delegates of the Miss United States Organization. If you're really feeling ferocious, you can get the opportunity to plant a pie right in a beauty queen's face."
Can't find any pics or further mentions of this online, so it may or may not have taken place. You guys who like to ferret these things out can play detective on it.