Yes, that was the disappointing part of Anza Borrego when I went through there after the Quartzsite gathering in 2010, No dogs on the trails.
It was OK for dogs everywhere except the trails. I didn't like the idea of leaving Lily in the trailer for the day while I was out hiking so I didn't go hiking. I cut my stay short and headed for places she can come with me. As it turned out that was all the way home.
Joy A. & Olive
and "Puff", too