Canyons are inherently risky. Flash floods occur without notice on sunny days. Technical skills & surrounding topography knowledge required yet does not eliminate risk.
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A technical canyon on the side of the Apache Trail with two rappels into swimmers that can be avoided in colder weather with a rappel downstream of the pools or an exposed down climb followed by a sweet section of small pools and boulder caves. Mileage depends on where you exit (old Apache Trail or up & over the ridge) and how much wandering you do down there
Check out the Official Route and Triplogs.
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.