Pretty hike. Only flaw was the quality of trail from the foot traffic of the horses leaving the trail wide and bumpy in some parts. Also would not recommend going during the summer because of the heat and there is also no access to potable water you would need to purify your own.
Run this trail year round. Fairly sandy trails, rolling hills, some shady spots but mostly open, great views. Bring plenty of water with you if its hot. Not heavily used but will likely run into mountain bikers occasionally and likely folks on horseback. During the week I've been out here and never run into anyone for hours on end. Open for hunting so wear bright colors(orange), be loud and stay on marked trails during the season.
I would rate this as a strenuous hike in the summer at least. We did the 14 mile blue loop and it was challenging no doubt. There was very little tree covering, about 90% of the hike, we were out in the open. I would say about 50% of the trail is soft sand-hard to get traction and slowing us down. It gave us a sense of what the desert feels like. There was not drinking water anywhere and there was virtually no areas where you could get help if needed. There was no shortcut to get back. In other words, once you begin hiking, you will need to complete the entire 14 miles. I had 4 16oz bottles of water and it still was not enough. I loved the hike and I am always looking for a good challenge. I would do this again.