I'm not a doctor and I'm not going to try and play one on this story so I'm asking you, how would you write this story? I'm not saying anything, this could have been left weeks ago and has nothing to do with the racers or it could have been planted there by somebody. Here is what I know, from someone who helped with the Recess at the Rez.
"Guys and Gals,
Check out what I found about two feet off the course on Pro Hill (at the Res) while cleaning up after the race:"