We are considering stopping in Monument Valley with grandkids on our way from the South Rim to Moab. We were there many years ago and thought it was beautiful. I don't remember the drive to see the area, about how long does it take. I know there is an entrance fee. I don't think there is any hiking, am I correct about this? thanks,

I recall it is a 17-mile drive on a good dirt road (if not wet) and free with purchase of ticket
No time limit
Picnic table, etc.

One, open to the public, hike originates at the View Hotel
All others required guide
Many guided hike, tours, horse,....
https://navajonationparks.org/

You should also visit Navajo National Monument
Vaga

Taking 163 from Kayenta to Monument Valley to 191adds very little driving time from GC to Moab. MV is about half way through the trip, so I would stop at the VC and have lunch or a snack and then make the decision to drive through the self driving loop or just heading for Moab.

That said if it is raining or has been, don't do the loop. If it is getting late in the afternoon, don't do the loop so you can get to Moab in the daylight. In any case the iconic views are seen right from the VC and along 163, so the kids won't be missing much.

Ensure you visit the fully restored/rebuilt Bluff Fort in the town of Bluff, Ut.
It was build in April 1880
*BLUFF FORT HISTORIC SITE*
Read their Hole In The Rock summary to the left of Home Page - The Trail
Also visit the ancient Indian Kiva next to their Cemetery

Vaga

I am not sure how old your grandchildren are but they might be interested in the exhibit about the WW II Navajo code talkers in the Burger King in Burger King in Kayenta. A fascinating story.

The Burger King in Kayenta has a small display of the Code Talkers. The owner was one of that Code Talkers
Behind the BG are replicas of Navajo Hogan (male/female) and a sweat house
The museum at Monument Valley has an extensive display on the Code Talker
The actual code used can be found here: at Navajo Code Talkers' Dictionary
REVISED 15 JUNE 1945
(DECLASSIFIED UNDER DEPARTMENT OF DEFENSE DIRECTIVE 5200.9)
Web site.
https://www.history.navy.mil/researc...ictionary.html

vaga

Thanks much, you all add some many interesting sites to our travels. Much appreciated.