Tuolumne River level at La Grange
California · Fishing & wading
Measured at USGS 11289650 — TUOLUMNE R BL LAGRANGE DAM NR LAGRANGE CA
Reading taken · as of 28 min ago
About normal for the date
At 179 CFS, this gauge is inside the middle half of the 55 years USGS has recorded for this date (1971–2026), at 170% of the 105 CFS median.
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Flow history at La Grange
Daily values from USGS 11289650, updated every 15 to 60 minutes. Provisional.
About Tuolumne River at La Grange
In California, below Don Pedro Reservoir. Releases can change the flow by hundreds of CFS in an hour with no rain in the basin — check it the morning you go, not the night before.
Reservoir feeding this stretch
Flow here is set by releases from Don Pedro Reservoir. A full pool usually means more water on its way down.
Tuolumne River at La Grange — common questions
3 questions
How do releases from Don Pedro Reservoir affect this stretch?
Directly and fast. When the dam generates, flow here can climb by an order of magnitude within the hour, with no rain anywhere in the basin. That sudden release is the real hazard on a tailwater. The pool level is on lakelvl.com, linked below.
Is Tuolumne River at La Grange high or low for this time of year?
The USGS median flow for late September here is 105 CFS, from 55 years of record (1971–2026). Today sits inside the middle half of those years, at 170% of the median. The comparison is what makes the raw number mean anything: the same reading is a drought on one river and a flood on another.
How often does this reading update?
USGS transmits from gauge 11289650 every 15 to 60 minutes. This page refreshes from USGS when you open it, and the reading is provisional until USGS reviews it. The timestamp is in the gauge's local time.