Palo verde trees are very well adapted to this unpredictably dry climate. In a dry spell there are no leaves, but the young growth of the plant is green - and can photosynthesize without leaves. Puts me in mind of the mangroves in the Everglades - well adapted to sea water because they can remove the salt.
Our exit will be through Split Mountain, but first we stop to hike to Wind Caves. Wind whooshes through carving caves. No more need be said. Alex finds lizard tracks inside one.