First, I did this as an out-and-back from the Picketpost Trailhead off of Hwy 60 (for a better sense of that route, see AZT - Picketpost TH to Red Mountain
), which is how most riders will access this segment. Second, I hope I can do this trail justice. The scenery is superb and the trail bed is great.
To reflect the south-to-north directionality of the AZT, this description will start from the end of AZT - Passage 18 - Reavis Canyon. Starting at a small saddle around 3,700', the trail makes a quick ascent before starting the long, grin-inducing descent. It is not entirely downhill as it rolls up and down but mostly trends downward.
This section of the AZT is very well-marked. The trail is almost entirely rideable, but it will challenge everyone in places and most riders along the way. This is not a super fast trail as a descent. It is not an incessant rock garden, but also not a flow trail. There is a rhythm, just not a fast one.
This might be the best trail I have ever ridden. There's a great mix of tech and backcountry feel. With that in mind, bring plenty of water and food. I recommend tubeless everywhere, but especially Arizona.