San Juan River
River in Colorado, read from 3 USGS gauges, draining about 14,600 square miles. Figures refresh every fifteen minutes.
Discharge
707
cfs · 39 min ago
Normal for today
881
cfs median, 48 yrs
Water temp
—
not measured here
Gage height
5.90
ft
Gauges on this water
Reading by reach
Reading the number
On this date the gauge has averaged 881 cfs over 48 years of record, with the middle half of years falling between 679 and 1,340 cfs. Today sits inside that band, which is as close to a normal October day as the gauge can tell you.
Regional hatch calendar
What is likely hatching near San Juan River
San Juan River does not have its own verified chart yet. This calendar is combined from the verified charts on Animas River (48 mi), San Juan River (50 mi), Rio Grande (93 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: absent | March: peak | April: peak | May: active | June: active | July: absent | August: absent | September: active | October: peak | November: peak | December: active |
| Caddis | January: absent | February: absent | March: absent | April: peak | May: peak | June: active | July: peak | August: peak | September: active | October: absent | November: absent | December: absent |
| Midge | January: peak | February: peak | March: peak | April: peak | May: peak | June: peak | July: peak | August: peak | September: peak | October: peak | November: peak | December: peak |
| 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 |
| Golden Stonefly | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: active | September: absent | October: absent | November: absent | December: absent |
| Grasshopper | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: peak | September: active | October: absent | November: absent | December: absent |
| Salmonfly | January: absent | February: absent | March: absent | April: absent | May: absent | June: peak | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| Sculpin | January: active | February: active | March: active | April: active | May: active | June: active | July: active | August: active | September: peak | October: peak | November: active | December: active |
| Terrestrials | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: active | August: peak | September: peak | October: active | November: absent | December: absent |
| Trico | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: peak | September: active | October: absent | November: absent | December: absent |
Reports
From anglers on San Juan 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.