150-Foot-Long Natural Waterslide in California Looks EPIC | Only Runs 3 Weeks Per Year Well, this place looks unreal… Where is this spot? Â If we had to guess, it’s in the grand canyon of the Tuolumne in Yosemite National Park, but that’s just a guess. “Deep into the Sierra Nevada mountain range lies a hidden gem of a water slide. This 150 foot long beauty is only possible to slide 3 weeks out […] Raft Riverbrains | August 16, 2017 8 Comments