Haven't seen Fox Run mentioned on any STL strings. IMO it's the 3rd best course in the STL metro area behind only SLCC and Boone Valley (Augusta, MO). The course is extremely challenging. The 3rd-6th is one of my favorite stretches in golf.
The 6th hole, a long par 5, is one of the best in the area. Somewhat uniquely, the creek crosses the fairway at about the 400 yd mark, producing a good deal of strategy if one finds the rough off the tee.
Golf only, great club, quite challenging. If you find yourself in STL, go out of your way to play Fox Run.