Alamosa River River Levels

Last Updated: December 4, 2025

The Alamosa River is a tributary of the Rio Grande in southern Colorado.


Summary

Total streamflow across the Alamosa River was last observed at 65 cfs, and is expected to yield approximately 130 acre-ft of water today; about 186% of normal. River levels are high. Average streamflow for this time of year is 35 cfs, with recent peaks last observed on 2017-06-06 when daily discharge volume was observed at 2,373 cfs.

Maximum discharge along the river is currently at the Alamosa River Below Terrace Reservoir reporting a streamflow rate of 9.16 cfs. This is also the highest stage along the Alamosa River, with a gauge stage of 2.18 ft at this location. This river is monitored from 3 different streamgauging stations along the Alamosa River, the highest being situated at an altitude of 9,403 ft, the Alamosa River Above Wightman Fork Near Jasper.

River Details

Last Updated 2025-11-02
Discharge Volume 130 ACRE-FT
Streamflow 65.4 cfs
0.0 cfs (0.0%)
Percent of Normal 185.8%
Maximum 2,373.0 cfs
2017-06-06
Seasonal Avg 35 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Alamosa River Above Wightman Fork Near Jasper
USGS 08235250
-999 cfs 0.66 ft 0
Alamosa River Above Terrace Reservoir
USGS 08236000
-999 cfs -0.10 ft 0
Alamosa River Below Terrace Reservoir
USGS 08236500
9 cfs 2.18 ft -98.39
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Alamosa River is a river in the southern part of the U.S. state of Colorado. It is about 64 miles (103 km) long, flowing roughly east through the San Luis Valley. Its watershed comprises about 148 square miles (380 km2).
The river's name means "shaded with cottonwoods" in Spanish.The river was affected by the Summitville mine disaster, the worst cyanide spill in United States history.