I went there a lot when I worked in the La sal mountains in Utah . And I can tell you that there are whole areas that are closed off by the parks that you cannot go into. You can not even get a permit to go in. We tried.
We found places that you could see carving in the stone walls and what looked like stairs . Took photos with a long lens and showed the Park office, we were told not to go into the area or we would be picked up on the spot.
I know that most do not hear of this or that they have these places . But they do and if you go you will find out.
We could not get anyone to answer why it was restricted , our company's Law firm was asked to find out and they could not
find out either.
Are there areas were you can go in, yes . A lot of them. But when you start trying to go in to some of the North wall areas or some of the off shoot canyons you can not. If you go to the park check in to the main office and they will tell you and give you a map that is marked where you can go and not go.
Strange I know and to this day I would like to have an answer as to why those places are closed to the public.