If there is a universal truth in the California's Sierra Nevada Mountains, it's that every major river drainage has a big, remote, class V canyon. From north to south expedition kayaker's choose from the most spetacular class V expeditions in the world: Bald Rock Canyon, Yuba Gap, The Royal Gorge, Fantasy Falls, Hells Kitchen, The Grand Canyon, Devils PostPile, The Middle Kings, and the Headwaters of The Kern. Of these 9 fabled whitewater descents, only one is prohibited by law.

on the Colorado River, Grand Canyon of the Tuolumne has been set aside not for river runners, but instead for backpackers, horse packers, and the water consumption needs of over 2 million Bay area residents. Also unlike the more famous Grand Canyon of the Colorado that drops 2200 feet in 277 miles, the Grand T drops a whopping 4500 feet in just 18 miles. From here one should only make comparisons with the other California classics.
I found the overall portaging to be slightly easier than the Devil's Postpile. The whitewater is a mix of the classic section Downstream of Cherry Creek, the Devil's Postpile, and high end V+ more demanding than anything else in the Sierr's. But trumping both the arduous portaging and adrenaline of the GCT is a Scenery that is unmatched and must be scene to be believed.
Despite miles of quallity whitewater set in the Sierr's most spectacular chasm, the GCT is usually the last river on everyone's list. The Grand Canyon itself is patrolled by gun toting Yosemite Park Rangers and paddling across Hetch Hetchy to get to the take out is a federal offence. These issues implies a additional layer of logestical complication. Try entering the river in the middle of the night and sleeping for only a few hours till day brake in order to race through the Glen Aulin Ranger Station area before 7 am. Even still we lucked into a window between multi-day ranger patrols, leaving and entering the park in complete incognito.
Big thumbs up to Chris Korbulic and Darin McQuoid for shrugging off alot of bad beta and challenging logistics to make only the 3rd or 4th complete descent of the Grand Canyon T and first known descent in conjunction with the downstream canyons of the Poopenaut Valley.
Beta
Put-In: Hwy 120 Bridge in Tuolumne Meadows (8600 feet)
Take Out: Hetch Hetchy Res (3700 feet)
Run Length: 24 miles
Avg Gradient: 245 feet per mile
Shuttle Length (one way): 2.5 hours
Put-In Flow: 700 cfs
Take Out Flow: 1200 cfs
Our portages (4 miles): Cold Morning slide*, Tuolumne Falls*, White Cascade*, California Falls*, Brunch Slides, LeConte Falls*, Waterwheel Falls*, Freight train area*, Muir Gorge, (1/2) Hot Pockets*.
Special Notes: Needs water... Runnable before Upper Cherry is in. Don't Get caught above Glen Aulin.
*Still unrunn
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