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White Pockets is indeed a very cool place to shoot. You got some nice shots here, but I do have a few suggestions.
#1, Overall my favorite, but you clipped the tops of the background mountains. I know they are the backdrop, but you still either want the top of the shot to show the peaks in the background, or they all should be cut off if the composition allows it.
#2 could move to be my favorite if you cropped the bottom of the shot off. For me what's so cool in that area is the stripes, the bottom of the shot is just some white rock, I would crop all of that off, go to a 4:5 format crop, and let the stripes start at the bottom of the frame and lead into the view.
#3 is a very interesting shot with lot's of potential. That rock is so different, but it looks like you used a grad to shoot this as the tops of the rocks on the left are almost black with no detail, that jumps out. Also, even though a grad of some sort seemed to have been used, the sky is still overexposed in spots. And last, you will see some flares from the lens in the shot, a yellow and a pink area in the white rock jump out. Clone that out, and in the future, what I suggest is that you take one shot were you actually poke your finger into the frame (in front of the lens) and block the sun and it's flaring in one frame you shoot. Then when processing, you use that frame as your basis to work from since it won't have any flaring in it. And then you just blend in the sun from a shot where you didn't block the sun.
#4 has some interesting rock structure in it, but some of the rock is over exposed, and sky is definitely overexposed. Hopefully you shot these in raw and watched your histogram to make sure you weren't blowing the highlights, then you could blend that sky into this frame.
I hope those suggestions help and don't seem overwhelming. Each shot has just a bit more work to really make them shine, they are close now, just a bit more work and you will have it.