Where to Fish Marias River


The headwaters of the Marias River drain slopes of the Continental Divide in Glacier National Park and Lewis and Clark National Forest before flowing eastward through the broad, rolling plains of north central Montana. The mainstem forms at the junction of Two Medicine and Cut Bank creeks, 12 miles north of Valier, Montana. Approximately 50 miles east and south downstream, the Marias discharges into Tiber Reservoir, a long earth-core impoundment completed in 1956 for flood control, irrigation, recreation, and municipal purposes. Below the dam, the stream meanders through a floodplain from 1/2 to 1 1/4 miles wide, flanked by steep buttes ranging to 200 feet high. The channel in many places is shallow, with small cobble in swift-current areas. Wide meanders and a shallow gradient characterize the river to Dugout Coulee. Twenty-four miles farther on, at Sheep Coulee, the Marias River begins a journey through a 21-mile-long, gorge-like river valley, 300 to 400 feet below the average elevation of the adjacent plains. Its varied and scenic badlands and breaks areas range from 1 to 3 miles in width. The river is approximately 150 feet wide through this section. A mile down from the mouth of the Teton River, the Marias joins the Missouri River, near Loma, Montana, over 170 miles southeast of its sources.

Mile Upper: 171.46
Mile Lower: 0.0
Mouth Latitude/Longitude: 47.92892 -110.49102
Status of the Fishery:
FWP Region: Region 4 
County: Chouteau  •  Glacier  •  Hill  •  Liberty  •  Pondera  •  Toole
Fishing District: Central  •  Eastern
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Waterbody Section Field Form Type Date Purpose Species
To see this data, first select one or more rows from the Collection Info tab.
For Comparative analysis all Length Units are millimeters : all Weights are grams

Species Count Avg StdDev Min Max AvgWgt StdDevWgt MinWeight S/L Sects Surveys Waterbody
To see this data, first select one or more rows from the Collection Info tab.
For Comparative analysis all Length Units are millimeters : all Weights are grams

Waterbody Section Species Count AveLength StdDevLength MinLength MaxLength AveWeight StdDevWeight MinWeight MaxWeight
To see this data, first select one or more rows from the Collection Info tab.
For Comparative analysis all Length Units are millimeters : all Weights are grams

Waterbody Year Section Species Count AveLength StdDevLength MinLength MaxLength AveWeight StdDevWeight MinWeight MaxWeight
To see this data, first select one or more rows from the Collection Info tab.
This is a preview, all fields will be visible by selecting a download option. For Comparative analysis all Length Units are millimeters : all Weights are grams.

Year Species Abbrv Length Weight M/C Count Sex Mort Hook Scar Disease Scales Otolith Fin Clip Tag Comment Genetics Age Stomach Intercept Slope Gear Equipment Trip Date Pass/Run Water Section Lat/Down Lon/Down Lat/Up Lon/Up Agency
Year River Mile Angler Days Std. Error
2017 0  to  80.45 2026 1051
2015 0  to  80.45 4870 1006
2013 0  to  80.45 5364 1110
2011 0  to  80.45 4004 889
2017 106.33  to  171.46 199 199
2015 106.33  to  171.46 435 299
2013 106.33  to  171.46 97 97
2011 106.33  to  171.46 702 289
View the latest Montana Fishing Regulations.
Station Name RiverMile Website Link
Marias River near Shelby MT 142 Link
Marias River near Chester MT 78 Link