Marmaton River

Last Updated: May 10, 2026

Total streamflow across the Marmaton River was last observed at 177 cfs, and is expected to yield approximately 352 acre-ft of water today; about 6% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 2,925 cfs, with recent peaks last observed on 2019-05-22 when daily discharge volume was observed at 39,650 cfs.

Maximum discharge along the river is currently at the Marmaton River Near Nevada reporting a streamflow rate of 104 cfs. However, the streamgauge with the highest stage along the river is the Marmaton R Nr Fort Scott with a gauge stage of 8.01 ft. This river is monitored from 3 different streamgauging stations along the Marmaton River, the highest being situated at an altitude of 881 ft, the Marmaton R Nr Uniontown.

The Marmaton River is a tributary of the Little Osage River and spans approximately 102 miles in length, flowing through southeastern Kansas and southwestern Missouri.


15-Day Long Term Forecast


River Details

Last Updated 2026-05-09
Discharge Volume 352 ACRE-FT
Streamflow 177.4 cfs
Past 24 Hours: -16.6 cfs (-8.56%)
Percent of Normal 6.07%
Maximum 39,650.0 cfs
2019-05-22
Seasonal Avg 2,925 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Marmaton R Nr Uniontown
USGS 06917240
21 cfs 0.04 ft -14.29
Marmaton R Nr Fort Scott
USGS 06917500
52 cfs 8.01 ft -8.87
Marmaton River Near Nevada
USGS 06918060
104 cfs 3.1 ft -7.14
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Marmaton River (MAR-muh-tuhn) is a 102-mile-long (164 km) tributary of the Little Osage River in southeastern Kansas and western Missouri in the United States. Via the Little Osage, Osage and Missouri rivers, it is part of the watershed of the Mississippi River.