The Zion National Park area contains several sites. A couple of them demonstrate the Cave Valley style of Pictographs very dramatically.
Cave Valley 1
Cave Valley is a well-known site and the Rangers at Zion Natural Park might even reveal its location. It is an extremely sacred site to Native Americans and merits the all the respect that we can give it.
Cave Valley 2
Cave Valley II is less frequently visited than Cave Valley I and you might find the Rangers reluctant to identify this site. Again treat the site with reverence.
Petroglyph Canyon, located within Zion National Park, is often recommended by the Ranger staff and my guess is that they reveal the location to visitors.
Note the Pochteca Trader symbols in this photo. You can see more of the Traders further west at Babylon and then a little further west at Red Desert Preserve. Quite interesting. What does it all mean? Possible a trade route from east to west?
A very interesting low and short cave, you must crawl in on your stomach to get a picture. Typical Cave Valley style pictographs (anthropomorphs) in red, green, and some orange colors.
There are similarities between this site and the Cave Valley I site.
Southgate Rock in Zion National Park, has received extensive damage and some of the Rock Art has been recovered. It's a nice rock, easily found.
The Springdale Yellow Man is not in Zion National Park but right outside the Park on private ground. Seek permission before visiting the site. Note some of the similarities between this artwork and the Apple Valley Yellow Man.
The Apple Valley Yellow Man has a triangular head and body, but the size, yellow color, red outline are very similar.