Whitewater Run CA Class V+

Devils Postpile Nat'l Monument to Mammoth Pool Reservoir

San Joaquin, Middle Fork

Linked via: Nhdplus gnis 95% confidence Synced 3mo ago

Monitor
Gauge Conditions
Runnable: 100.0 – 250.0 CFS

This gauge was installed on 7-15-10, a week after we did the run. They did a measurement on the 15th and it read 142 cfs. Correlating from Millers and Rogers

Run Map
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Description
The Middle Fork of the San Joaquin is now getting boated by one to several groups a year in most years.   It seems likely this incredible canyon will become steadily more popular. More and more of the drops are being run, but many portages are still necessary. The famous Crucible section is often paddled now, so that big portage has been eliminated by some groups. Season:  This reach must be boated as flows drop near the very end of the run off season.  Often this will be in July.  In wet years, the best boating levels could be in August. Put-in elevation: 7,545 feet (2300 meters) Take-out elevation: 3,330 feet (1,015 meters)+- (varies with elevation of Mammoth Pool) Google Earth has excellent hi resolution aerial images of much of this section. Put in: It is not legal to paddle within Devils Postpile itself, so hike boats downstream on the trail to the monument boundary before launching. Other Information Sources: Devil's Postpile Headquarters: 760-934-2289 [

Rapids in this Run (1)

Difficulty
Class V+
Length
28.1 mi
Gradient
120 ft/mi
Rapids
1
Shuttle Info
The fastest way between Devil's Postpile and Mammoth Pool is over Tioga Pass through Yosemite, down Highway 41, turn off to the Bass Lake, then take Beasore Road to Grizzly Rd to Minarets and Mammoth Pool. The map below shows driving through Bass Lake to North Fork and then up the Minarets/Mammoth Pool road.   However, the Beasore route  might save as much as 15 to 30 minutes.  From Bass Lake, take Beasore Road (5S07) then Grizzly Road (6S01).   A few miles before Minarets Rd, Grizzly Rd forks at a campground.   The left fork (6S01) crosses a creek and turns to dirt.  The right fork (6S71) is paved. National park fees are required to pass through Yosemite and to enter Devils' Postpile Monument.    One time permits are good for 7 days.
Difficulty Classes
I Easy II Novice III Intermediate IV Advanced V Expert/Extreme VI Unrunnable
Current Conditions
5-Day Forecast
Whitewater data from
American Whitewater