When you are finished, you must remove all of your targets, gun shells, etc. We recommend that you do not use clay pigeons as targets, as you can be cited for littering if you leave any debris. Even the so-called “biodegradable” clay targets remain indefinitely in the dry, fragile landscape of the desert, and their presence constitutes a visual impact on the landscape that can infringe on the enjoyment of the outdoors for other recreationalists. If you choose to use clay pigeons, be prepared to clean up all fragments large enough to see with normal vision, as well as other litter into which the clay fragments may fall. (See Rules and Regulations Section, below, for more information.)
This is from the blm
website