Dirt bikes. Lot's of them with factory trucks and medical crews.

It's a charity race across Colorado, they've been doing it forever.

http://www.colorado500.org/

I have the Outlaw restaurant reserved for dinner on Tuesday, but there was no way I was going to drop $1500 to reserve the Mountain Cookout without a solid head count. Now it doesn't matter anymore (and I'll be at the Pinion that night eating Elk).