After a number of fun rapids, Deer Creek comes in from river left and joins the South Platte.  Although the creek is often missed by passing boaters, a massive rock plate leaning against the right canyon wall signals that Deer Creek rapid is approaching.  Eddy out river left behind a huge boulder to scout.  This rapid is steep, boats remarkably smoothly, but has been the site of some nasty injuries.  I've heard multiple stories of shoulder dislocations caused by running the last two slides upside down.  As an upcoming class IV boater, the first time I saw this rapid, I was terrified by the gradient, but after watching a couple successful runs I gave it a shot and instantly fell in love.  

Multiple lines exist, but at normal flows a rock grind on the left side of the first slide is a favorite.  At higher flows this rapid becomes more legit and worthy of a scout for most boaters.