About this river
Napias Creek is a 4.5 mile stream near Salmon River Adventure Company in Idaho. Streamflow is measured at the USGS gauge Napias Creek below Arnett Creek near Leesburg, ID (site 13306385). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1991 to 2026
Napias Creek typically runs highest in May, at a median 106 cfs, and lowest in February, at 8.1 cfs. The highest flow on record for any single day is 616 cfs, in 2011.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 8.4 | 7.2 to 9.5 | |
| February | 8.1 | 7.0 to 9.0 | |
| March | 8.6 | 7.5 to 9.9 | |
| April | 19 | 14 to 29 | |
| May | 106 | 73 to 161 | |
| June | 77 | 49 to 129 | |
| July | 22 | 17 to 28 | |
| August | 12 | 10 to 15 | |
| September | 10 | 8.7 to 12 | |
| October | 10 | 9.1 to 12 | |
| November | 9.8 | 8.7 to 11 | |
| December | 8.9 | 7.8 to 9.9 |
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 34 years of record. Statistics published by the US Geological Survey for Napias Creek below Arnett Creek near Leesburg, ID (site 13306385). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Napias Creek'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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