You will meet with your guide on the west side of the parking lot of the Monument Valley Visitor center. There will be a booking booth with a large sign "Guided Tour Information". Tell the person inside you have a reservation with "Navajo Guided Tours Services" and your guide will escort you.
You can cancel up to 24 hours in advance of the experience for a full refund.
up to 24 hours before the experience starts (local time)