About this river
East Boulder River is a 4.1 mile stream near Rubber Ducky River Rentals in Montana. Streamflow is measured at the USGS gauge East Boulder River bl Dry Fork Cr nr Mcleod, MT (site 06197800). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2020 to 2026
East Boulder River typically runs highest in June, at a median 258 cfs, and lowest in March, at 4.2 cfs. The highest flow on record for any single day is 913 cfs, in 2022.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 6.9 | 5.1 to 8.2 | |
| February | 5.0 | 4.0 to 6.4 | |
| March | 4.2 | 3.4 to 5.8 | |
| April | 6.3 | 4.4 to 10 | |
| May | 59 | 32 to 111 | |
| June | 258 | 169 to 330 | |
| July | 38 | 32 to 63 | |
| August | 21 | 17 to 27 | |
| September | 15 | 12 to 20 | |
| October | 14 | 12 to 21 | |
| November | 11 | 10 to 14 | |
| December | 9.1 | 8.1 to 10 |
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 6 years of record. Statistics published by the US Geological Survey for East Boulder River bl Dry Fork Cr nr Mcleod, MT (site 06197800). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show East Boulder River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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