The track is about 2 1/2 to three in inches long. It's in the mud on the edge of a creek. It looks like the rear foot.
There are some other tracks ahead of it. They start at 3:40 into this video. I found it odd there was only one track of this type. It may not go with the ones ahead of it. There is no chance it was human made. I was bushwacking and there weren't any human prints in the ares. I watch for those as homeless people go in that general area and I try not to disturb them.
Based on the vid I'd guess deer or elk. The still looks like it dragged its hoof, so based on just that shot I'd second "ET."
On a day hike last week I saw odd barefoot prints that I eventually realized were from somebody wearing those "toe" shoes. They conjured all sorts of theories before I figured that out.
Rick, a couple of years back when those "toe-shoes" first came out, I kept running to them on trail and thinking "who the HECK is out here running barefoot!" THEN someone showed me the "barefoot" vibram sole things.
I agree with the overlapping deer prints (which a couple of people mentioned. At least in San Diego county, young deer can often have that print that looks like a fat equal sign with only a faint point. Those might even be a fawn with her mom.
I also believe that its a doubled deer track . Almost like something spooked her and she steps her front hoof back to where the rear one was as it looks like there some weight displacement in th original still not the normal forward momentum tracks.