Oh no....Coos Bay is very large riding area that is broken up into 3 areas. Horsfall, Spinreel, and Bull Run. There is a ton of variety there with big dunes, trees, trails, beach. You name it's there. Well not a lot of bowls but you can spend several days there exploring around. The drag races are being held at the southern most point of the dunes in an area known as boxcar hill.
Here is a link to a site that gives great information:
http://www.duneguide.com/sand_dune_guide_oregon_coos_bay.htm
And note....ANYBODY can race. Stock to highly modified are all welcome!