Crushed clam shell is great for:

Biking-ATV / 4 Wheeling

Crushed Clam Shells Has a Texture that Compliments the Surface for All types of Off-Roading

Hiking Trails are Less Strenuous when Paved with Crushed Clam Shells

Additionally Chances of Getting Disoriented or  Lost is Virtually Impossible

Clam Shells Create a Barrier on Shorelines and Discourage Beach Erosion

Unlike Fill Dirt That Usually Doesn't Hold up During Storms