Lower Willow Creek canyon is an easy hike, as long as it's not a hot day! Two miles of exposed desert wash hiking,
then a quarter-mile or so of nice narrows,
ending at a 40-foot waterfall complete with running water.
This picture doesn't do justice to the falls, it's a really pretty spot. The trailhead is the same one as Sidewinder Canyon so it's easy to do both canyons. This is all low elevation (the trailhead is at -220 feet), I wouldn't want to hike this in the summer heat.
GPS details at EveryTrail