This is where the Mineral Council led a collecting trip in spring of 2018. Its great advantage is that the site is right beside the road. Below are the directions and maps provided by the Mineral Council and my photos of the site. The photos should help you locate the right spot once you have driven the 1.4 miles from the last turn.
fossil site, near Racehorse Creek. 
parking spot from fossil site, near Racehorse Creek. 
fossil site, near Racehorse Creek, from parking spot 
fossil site, near Racehorse Creek, from parking spot