I just joined this site because I saw the post on Diana Zacarias being missing, and I hike at Grand Canyon regularly. On my hike last week, I noticed several missing person posters on the road to Hermit Rest. I did notice some unusual helicopter activity in the Hermit area. Since this is a no-fly zone for tourist helicopter flights, you only see aerial activity when the NPS is doing official business such as maintenance and search and rescue. Also I noticed on a hiking forum a couple of days ago, the NPS has officially stopped aggressively searching for her. I am going up there again tomorrow and am planning a hike down the Hermit trail, thence off to the Dripping Springs trail and looping out via a seldom used route. I will certainly keep an eye out for anything suspicious. Also, I have read through the previous posts and can make these observations:
1. The chance of something happening to her on the rim trail between Hermit Rest and the Grand Canyon village is very remote. It is a well traveled route for thousands of tourists and it is rare that you walk this route without seeing someone every couple of minutes.
2. The Hermit Trail sees a lot less traffic than the two most popular hiking trails, the Bright Angel and the South Kaibab, but it still sees a fair amount of hikers each day. Accessing this trail is done via the shuttle bus, as the road is closed to private vehicles from March 1 until December 1, except for those with handicap passes and for hikers that have overnight backpacking permits and wish to park at the trailhead. The distance to the Hermit Trail is 8 miles from the village, so if she were to hike there, it would undoubtedly be via the shuttle bus.
3. Falls from the rim are not unheard of, but are rare enough that they are not the first thing that the National Park Service checks for. And as gruesome as it may sound if this does happen, body location is found fairly easily due to increased activity by ravens and other birds.
I am hoping for the best and that she will be located soon.