Portneuf River
River in Idaho, read from 4 USGS gauges, draining about 1,305 square miles. Figures refresh every fifteen minutes.
Discharge
286
cfs · 56 min ago
Normal for today
429
cfs median, 35 yrs
Water temp
—
not measured here
Gage height
4.63
ft
Gauges on this water
Reading by reach
Reading the number
On this date the gauge has averaged 429 cfs over 35 years of record, with the middle half of years falling between 369 and 475 cfs. Today is below that band: lower, clearer and, in summer, warmer water than a typical October day here.
Regional hatch calendar
What is likely hatching near Portneuf River
Portneuf River does not have its own verified chart yet. This calendar is combined from the verified charts on Snake River South Fork (58 mi), Logan River (70 mi), Hoback River (77 mi). Treat it as regional timing, and file a report if you see something different here.
| Insect | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Blue-Winged Olive | January: active | February: active | March: peak | April: peak | May: active | June: absent | July: absent | August: absent | September: active | October: peak | November: peak | December: active |
| Caddis | January: absent | February: absent | March: absent | April: active | May: peak | June: peak | July: peak | August: peak | September: peak | October: active | November: absent | December: absent |
| Golden Stonefly | January: absent | February: absent | March: absent | April: absent | May: active | June: peak | July: peak | August: active | September: absent | October: absent | November: absent | December: absent |
| Pale Morning Dun | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: peak | September: active | October: absent | November: absent | December: absent |
| Midge | January: peak | February: peak | March: peak | April: active | May: absent | June: absent | July: absent | August: absent | September: absent | October: active | November: peak | December: peak |
| Salmonfly | January: absent | February: absent | March: absent | April: active | May: peak | June: active | July: peak | August: absent | September: absent | October: absent | November: absent | December: absent |
| Crane Fly | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: absent | August: active | September: peak | October: peak | November: absent | December: absent |
| Grasshopper | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: peak | September: peak | October: absent | November: absent | December: absent |
| Gray Drake | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: active | August: active | September: absent | October: absent | November: absent | December: absent |
| Green Drake | January: absent | February: absent | March: absent | April: absent | May: active | June: peak | July: active | August: absent | September: absent | October: absent | November: absent | December: absent |
| Hecuba Drake | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: absent | August: absent | September: peak | October: absent | November: active | December: absent |
| Little Yellow Stonefly | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: active | August: active | September: active | October: absent | November: absent | December: absent |
Reports
From anglers on Portneuf River
No reports filed here yet. The first one becomes the page’s local knowledge, stamped with the flow at the time. File a report.