San Joaquin, S. Fork

This section was finally boated in late August of 2008, by Darin Mcquoid, Kevin Smith, Ben Stookesbury and Matt Thomas. They took 4 days to travel about 40 miles. They actually put in on Mono Creek below Mono diversion, because SCE was releasing 500 cfs from Edison reservoir down Mono Creek to the SF San Joaquin and then to Mammoth Pool. SCE had to transfer water for downstream farmers despite having several critical powerhouses down for maintanence.

Darin has a trip report with photos at JeffersonStateCreeking.

Ben has a trip report with video at: August 30th, 2008: South Fork San Joaquin

To our knowledge, up until 2008 there had been no descents of the SF San Joaquin past the Mt. Tom heliport and perhaps no descents since the early trips reported in Holbeck & Stanley. Lack of flow information and lack of dependable flows are big reasons for this. The scenery is fantastic and much of the boating is excellent. The boating that lies past Mt Tom to the middle fork confluence is steep and committing. Many difficult and challanging portages must also be overcome. 500 cfs is an optimum flow according to the first descent team.

After one reaches the Middle Fork confluence, additional issues arise as one must deal with the combination of flows and the remaining serious rapids and portages down to Mammoth Pool. During a spring or early summer run, flows in the middle fork will be high. Even side creeks in the SF will add more flow over the course of the run. The 2008 team reported that the 650 cfs flow (approximate) was an excellent level for the middle fork between the south fork confluence and Mammoth Pool.

There are a few situations in which boatable flows may be found in the SF San Joaquin.

Spring sills from Florence can provide moderate flows

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