Bouldering in the Pima Canyon wash, near the east end of Phoenix's vast South Mountain Park/Preserve, requires extreme skill, not just because of the difficult routes, which are rated V0 (equivalent to about 5.10 at local rock-climbing gyms — not a beginner rating) to an insane V7, but also because of the scary landings. Bouldering typically involves rock climbing with rock shoes but no rope on routes low enough to fall off without serious injury. In this "developed" climbing area (the short climbing routes are detailed in a pamphlet published by local climber Marty Karabin and found in area outdoors shops), the routes go too high, and have wicked-angled boulders to fall on if you miss a handhold.
So why do we love it? Fact is, we've enjoyed the place many times without finishing a route — that is, we climb up only a few feet, and leave the top-outs for stronger, nuttier athletes. No shame in that — it's bouldering. The idea is to get a good pump. And that we do. The rock quality here is passable, considered "granitic" but not granite. Its boulders often have a veneer of desert varnish, which feels great to grip. Good cracks rise up high enough to practice fist jams and foot placement.
You've got to watch for the inevitable crumbly hand- and footholds. But the expansive, fun-to-explore area of dry waterfalls, varnished boulders, and arroyo sand is worth several hours of your life on a nice day. Often, you'll see some of the local hardmen and women who spend hours a day — every day — on the rock and maybe some of the overconfident klutzes who'll make you want to get your phone ready to call 911. If you spot someone staying safe and low but still having fun, that might be us.