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Montana Whitewater Rafting & Zipline - Gallatin

North Fork West Fork Gallatin River near Montana Whitewater Rafting & Zipline - Gallatin

Stream2.8 mi
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About this river

North Fork West Fork Gallatin River is a 2.8 mile stream near Montana Whitewater Rafting & Zipline - Gallatin in Montana. Streamflow is measured at the USGS gauge Gallatin River above Deer Creek, near Big Sky, MT (site 06043120). The mapped line runs from 45.3029, -111.3432 to 45.2663, -111.3206. The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.

Typical flow by month

2019 to 2026

North Fork West Fork Gallatin River typically runs highest in June, at a median 1,725 cfs, and lowest in February, at 208 cfs. The highest flow on record for any single day is 5,640 cfs, in 2022.

Typical flow by month at Gallatin River above Deer Creek, near Big Sky, MT, in cfs
MonthTypical (cfs)Usual range (cfs)Relative level
January215186 to 236
February208190 to 227
March220203 to 235
April295251 to 397
May1,200930 to 1,460
June1,7251,415 to 2,440
July655436 to 799
August406323 to 433
September313274 to 358
October289275 to 341
November271237 to 288
December223198 to 246

Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 7 years of record. Statistics published by the US Geological Survey for Gallatin River above Deer Creek, near Big Sky, MT (site 06043120). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.

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