The Narrows is a pretty popular hike in Zion, so popular that views like this are pretty hard to get without being swarmed with tons of people. Fortunately, I took a 10-stop ND filter, and was able to take a long enough exposure that anyone in the frame got blurred into oblivion. ;)
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Great shot. I used the same technique to get rid of everyone on the Tower of London Bridge. Posing my friends for 10 seconds in complete stillness, so they looked like they were the only ones there, was the toughest part.
Quick question. I have pretty much the same shot (shorter exposure). I hiked up The Narrows and got to that point at around 4pm to avoid the crowds. Problem is, my shot doesn't have that amazing warm glow coming out of the canyon. Do you remember what time you shot this?