Indeed the setting and the Navajo nation as sponsor are a one-of-a-kind experience.
I've never been to Monument Valley, but I love that part of the country. The satellite view of your run is spectacular. Looks like a complicated course, did they have a lot of marshalls helping people go the right way?
Monument Valley is an awesome place, but public access is not allowed to half of the interesting buttes and rock formations. The marathon however went through these areas, the half marathon did not. We participated in a 3.5 hour guided tour on the day before the race that also went through those areas - It ended up giving me a good preview of the marathon course.
Yes, the course was superbly staffed at the aid stations, and it had marshalls at all the crucial points. The turn-arounds were marked by green pylons,mostly at natural dead ends ("artists' point", etc). For one of the turn-arounds that had several marshalls, we were sent to the top of a very steep sand-hill underneath a natural arch that had a great echo. I guess that we runners were supposed to do a yodel when sliding back down to entertain the marshalls. I did!
Looks like a wonderful course, and a great run from you.