I am writing to express my disapproval of horse riders on public park trails. I am a pet owner who often ventures to the dog park and off-leash areas. I also always carry plastic bags for my animals' waste cleanup. Almost every time I go out to a public park such as Lake Padden, I am sure to find at least one gigantic pile of horse waste on the trails. Whether I am walking my dog, running or bicycle riding with my child, I need to constantly be looking out for horse waste so as not to step in it. Why do dog owners need to be so diligent about cleanup yet the horse owners don't follow the same common courtesies? As a lifelong community member and as a pet owner, I am very disappointed that the parks department has not instituted more generic animal cleanup signs as I see dog cleanup reminder signs everywhere. All I ask is for horse riders and owners to be more conscience of the other people trying to enjoy the trails and clean up after your animal just like we have to do. I'm sure it's not hard to carry a large bag and a folding shovel.