San Juan River in New Mexico
Around here
Around San Juan River
Public land: USGS PAD-US
About this river
San Juan River is a 38.5 mile river. Streamflow is measured at the USGS gauge San Juan River at Four Corners, CO (site 09371010). The National Hydrography Dataset places it at stream order 9. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1978 to 2026
San Juan River typically runs highest in June, at a median 3,905 cfs, and lowest in August, at 831 cfs. The highest flow on record for any single day is 16,400 cfs, in 1979.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 852 | 652 to 1,090 |
| February | 885 | 628 to 1,200 |
| March | 1,000 | 701 to 1,880 |
| April | 1,345 | 686 to 2,585 |
| May | 2,770 | 1,300 to 5,710 |
| June | 3,905 | 1,530 to 6,690 |
| July | 1,130 | 652 to 2,100 |
| August | 831 | 553 to 1,410 |
| September | 864 | 583 to 1,350 |
| October | 887 | 697 to 1,320 |
| November | 903 | 740 to 1,140 |
| December | 878 | 681 to 1,100 |
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 48 years of record. Statistics published by the US Geological Survey for San Juan River at Four Corners, CO (site 09371010). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
3 mapped launches sit in the mapped area of San Juan River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show San Juan River'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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