Rafting America's Most Difficult RiverWes Siler7/16/14 11:00pmFiled to: adventuresraftingcherry creekcaliforniaall outdoorswhitewaterriverhow toall outdoors california whitewater raftingIndefinitely Wild436EditPromoteShare to KinjaToggle Conversation toolsGo to permalinkWith 15 class V rapids in under 9 miles, Cherry Creek and the Upper Tuolumne River are considered the most technically challenging rafting river in the country. Last weekend, we ran it. Here's how you can too.Video: Chris Brinlee Jr.AdvertisementI haven't been rafting in years. So, when a random email showed up inviting us to run the "Most advanced commercially run river in California, if not the United States," I obviously said yes. Four days later, Chris and I were in a car, driving to Yosemite armed with little but an old pair of shoes Wiley had helpfully readied for river duty with his teeth. Full Disclosure: All Outdoors let two of us run the river for free and fed us a couple sandwiches. We were part of a typical commercial trip with ten other guests.Cherry Creek forks into the Upper Tuolumne, which runs down from Hetch Hetchy Reservoir. Even after you join the Tuolumne, it's water released by Cherry Lake that you're rafting on, so everyone just refers to the run as "Cherry Creek."