About this river
Saint Anthony Canal is an 8.6 mile canal near Three Rivers Ranch in Idaho. Streamflow is measured at the USGS gauge Henrys Fork at ST Anthony ID (site 13050500). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1919 to 2026
Saint Anthony Canal typically runs highest in May, at a median 3,380 cfs, and lowest in July, at 1,120 cfs. The highest flow on record for any single day is 12,700 cfs, in 2011.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 1,550 | 1,300 to 1,870 | |
| February | 1,580 | 1,330 to 1,810 | |
| March | 1,510 | 1,280 to 1,780 | |
| April | 1,945 | 1,480 to 2,400 | |
| May | 3,380 | 2,400 to 4,720 | |
| June | 2,825 | 1,820 to 3,840 | |
| July | 1,120 | 938 to 1,380 | |
| August | 1,180 | 974 to 1,420 | |
| September | 1,230 | 982 to 1,465 | |
| October | 1,240 | 986 to 1,590 | |
| November | 1,460 | 1,240 to 1,790 | |
| December | 1,530 | 1,300 to 1,830 |
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 75 years of record. Statistics published by the US Geological Survey for Henrys Fork at ST Anthony ID (site 13050500). 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 Saint Anthony 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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