Of the 3 canyons in this area (Burro Wash, Cottonwood Wash, and Five Mile), Cottonwood Wash is by far my favorite. With a shuttle, it is a very casual canyon, though will take a full day by the time the shuttle is done both ways. The narrow section is magnificent, and fairly continuous.
All drops are fairly short, with relatively straightforward anchors. That makes this a good choice for intermediate canyoneers, or even beginner groups with competent leadership. Some groups do 4+ rappels, though 3 seems to be the number of mandatory rappels with a few moderate downclimbs interspersed throughout the canyon as well.
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