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🌊 Tuolumne River · Class IV

Is Main Tuolumne running?

Flow now
No current reading
no reading since Nov 1 · last reading 99 cfs

Reading from Nov 1, 4:00 AM MT. Site data as of Nov 4, 2026, 4:04 PM MT.

Status
No current reading
Off season (commercial)
Runnable range: 500–10,000 cfs
86112137Wed 28Thu 29Fri 30Sat 31Sun 1

Last 7 days (cfs), Mountain time. Low 84 cfs, high 139 cfs.

StatusNo current reading
Off season (commercial)
RiverTuolumne River
SectionMeral's Pool to Ward's Ferry
ClassIV
Nearest townGroveland, California
Runnable range500 cfs to 10,000 cfs
Low 500 cfs · medium from 2,000 cfs · high from 4,000 cfs · max 10,000 cfs
Source: American Whitewater, on the same gauge shown here. Checked 2026-11-04.
Commercial seasonApr–Sep (typical outfitter season)
Off season (commercial)
GaugeTMP (California CDEC TMP)
Dam releaseYes, flow is set by dam releases.
PermitsStanislaus NF permit required for private trips.
NoteFlow is set by Holm Powerhouse releases. Gauge is California CDEC station TMP.
More infoAmerican Whitewater river page

Flows are informational, not a safety call. Gauge readings can be delayed, provisional, or wrong, and a gauge may be miles from the run. Rivers change fast. Check with a local outfitter or the managing agency (BLM, USFS, NPS, dam operator) before you go.

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