While hiking around in the backcountry of the Kodachrome Basin State Park in Southern Utah, we found these mysterious sand/mud paths down the hills. They are obviously formed by water running in paths down the sides of the hills, but the mystery is how they remain as paths with raised sides. There are other nearby places there the water simply cuts into the sand or mud and makes a miniature gully or wash, but these seem to be stuck on the surface of the sand or clay. Here is another close up of the mud slide.
I cannot find any reference to these strange formations online. Perhaps I do not know what to call them.