Whoops! Almost let this slip out of sight unanswered.
Utahtea, you've got me stumped. I haven't found any pictographs that match your post, with or without the clues, so unless somebody else can solve it, you've beat the house on this round!
I've got a whole lot more that are going to be even harder to identify! Also have some easy ones...will have to dig up an easy one for next time.
What year was this panel created? Is this a depiction of cattle rustling? Who knows?! In my preliminary search (on Google, of course) I couldn't come up with any image that matched yours; not even close. I usually have much better luck with image searches; could be that I just didn't know what to call those pictographs, because once I added the location that you so kindly handed to me, I found dozens of references, and a ton of photos that were just like yours. I did a quick skim of my search results, and I thought it was interesting that the focus of the top-of-the-crop articles on the Fish Creek Cove Petroglyphs (mostly blog posts) was almost always on the hike, and on the setting. None of them delved too deeply into the origins, or the symbology. I reckon that if I really want to know, I'll have to dig out my virtual shovel!
Meanwhile: feel free to put up more of the tough ones! We love a challenge!
What you really can't tell until you see people in the pictures is how BIG they really are!
I've got a couple busy days ahead of me, so I don't want to post something and leave you all hanging, so it might be a couple of days and then I'll post some more. If anyone wants to challenge me, please feel free to do so!
One word: Wow!