Here are a few photos from a Cyclocross race at the Velodrome Park near Boise recently.
If you’re wondering what Cyclocross is, it’s a winter cycling sport in which riders do laps on a short course with steep inclines, jump over barriers, and race for a certain time period plus a certain number of laps, using modified or custom-built road/mountain bikes. You can find more info on Wikipedia’s Cyclocross Page
Those photos are really something else! I’ve never seen cycling look like that before!