Here are some of Sersh's racing mods.
Beach Circuit (A race track with twists and turns including one ramp)
Beach Rally (A basic circular race track with some bumps and some sand moguls. Also including one ramp.)
Beach Rally 2 (A race track in a rectangle form. Includes a/an: obstacle course, hills, sand moguls and two ramps)
WARNING These files are only the .ter (.terrain) part of the set. So these files are just the "pre d/l" (pre download) to make the load shorter when entering the server.