Canyons are inherently risky. Flash floods occur without notice on sunny days. Technical skills & surrounding topography knowledge required yet does not eliminate risk.
Overview: If you thought accessing Skeleton Cave was difficult to visit, then try descending the canyon that's below it... A few rappels up to 300ft thru the upper Rhyolite and lower volvanic tuff narrows. Access can be reach by either a power boat up Canyon Lake, hiking 10-12 miles thru thorny desert, or better yet use or packraft/kayak to paddle there and leave it while you do the canyon. Enjoy! =)
Check out the Triplog.