Summary
Total streamflow across the
Tuolumne River
was last observed at
1,037
cfs, and is expected to yield approximately
2,057
acre-ft of water today; about 111%
of normal.
Average streamflow for this time of year is
938 cfs,
with recent peaks last observed
on
2023-05-26 when daily discharge volume was observed at
51,230 cfs.
Maximum discharge along the river is currently at the
Tuolumne R Bl Early Intake Nr Mather Ca
reporting a streamflow rate of 420 cfs.
However, the streamgauge with the highest stage along the river is the
Tuolumne R A Modesto Ca
with a gauge stage of 37.23 ft.
This river is monitored from 6 different streamgauging stations along the Tuolumne River, the highest being situated at an altitude of 3,831 ft, the
Tuolumne R A Grand Cyn Of Tuolumne Ab Hetch Hetchy.
River Details
| Last Updated | 2026-01-22 |
| Discharge Volume | 2,057 ACRE-FT |
| Streamflow |
1,037.0 cfs
-19.0 cfs (-1.8%) |
| Percent of Normal | 110.58% |
| Maximum |
51,230.0 cfs
2023-05-26 |
| Seasonal Avg | cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Tuolumne R A Grand Cyn Of Tuolumne Ab Hetch Hetchy
USGS 11274790 |
286 cfs | 9.15 ft | -3.7 | |||||
|
Tuolumne R Nr Hetch Hetchy Ca
USGS 11276500 |
54 cfs | 2.92 ft | 0 | |||||
|
Tuolumne R Ab Early Intake Nr Mather Ca
USGS 11276600 |
69 cfs | 12.43 ft | -2.12 | |||||
|
Tuolumne R Bl Early Intake Nr Mather Ca
USGS 11276900 |
420 cfs | 4.8 ft | 1.2 | |||||
|
Tuolumne R Bl Lagrange Dam Nr Lagrange Ca
USGS 11289650 |
241 cfs | 4.67 ft | 1.26 | |||||
|
Tuolumne R A Modesto Ca
USGS 11290000 |
331 cfs | 37.23 ft | -3.78 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The river has a rich history, having been home to indigenous communities for thousands of years and later serving as a vital transportation route during the California Gold Rush. Today, the river is used for agricultural irrigation and hydropower generation. It is also home to several reservoirs and dams, including the Don Pedro Dam, the New Don Pedro Reservoir, and the Hetch Hetchy Reservoir. These provide drinking water to the San Francisco Bay Area and irrigation water to the Central Valley. The Tuolumne River is also popular for recreational activities such as fishing, camping, hiking, and whitewater rafting.