About this river
Teton Island Canal is a 2.2 mile canal near Three Rivers Ranch in Idaho. Streamflow is measured at the USGS gauge NF Teton River near Sugar City ID (site 13055250). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1977 to 2026
Teton Island Canal typically runs highest in June, at a median 376 cfs, and lowest in August, at 11 cfs. The highest flow on record for any single day is 1,750 cfs, in 2010.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 92 | 72 to 117 | |
| February | 95 | 75 to 118 | |
| March | 132 | 111 to 145 | |
| April | 152 | 87 to 228 | |
| May | 259 | 171 to 437 | |
| June | 376 | 209 to 613 | |
| July | 40 | 9.4 to 99 | |
| August | 11 | 0.5 to 54 | |
| September | 23 | 1.0 to 65 | |
| October | 60 | 32 to 102 | |
| November | 93 | 70 to 123 | |
| December | 94 | 70 to 120 |
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 24 years of record. Statistics published by the US Geological Survey for NF Teton River near Sugar City ID (site 13055250). 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 Teton Island Canal'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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