Rivermatics

USGS Streamgage 09342500

San Juan River at Pagosa Springs, CO

San Juan River at Pagosa Springs, CO is USGS streamgage 09342500 in Colorado, monitoring river discharge in hydrologic subbasin 14080101. It sits on the San Juan River, alongside 9 other gauges Rivermatics tracks on the same river. It drains a watershed of about 281 square miles. Discharge records at this site go back to 1911. Typical flow runs near 215.9 cfs in July and 490.2 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Colorado
Drainage area
281 sq mi
Gauge elevation
7,056 ft
Subbasin (HUC-8)
14080101
Coordinates
37.26553, -107.011
USGS site number
09342500
Records begin
1911-07-02 (115 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for San Juan River at Pagosa Springs, CO. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
18.1 20.4 23.1
15.9 19.1 23
14.6 18.3 23.1
14.3 18.9 27.5
16.1 22.8 40.5
19.6 33.7 85.2
22.9 45.1 119
22.1 41.8 102
20.5 36.4 86
21.7 39.7 97.1
21.8 41.4 100
20.3 37.2 83.3
19.1 34 70.8
18.4 31.7 61.8

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 91 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 36.7 53.5 85.4
February 40.7 58.5 99.9
March 62.7 118.3 350.8
April 205.3 490.2 1,060.8
May 518.5 1,151 2,176.5
June 295.6 1,051 2,440
July 64.3 215.9 905.9
August 41.9 122.4 356.4
September 33.9 88.2 332.7
October 42.2 89.7 309.2
November 42.6 76 168.4
December 37.4 57.8 107.2

All values in cubic feet per second (cfs).

Common questions

When does San Juan River at Pagosa Springs, CO normally run highest?
May, on the long-term record. The median daily flow that month is about 1,151 cfs, against 53.5 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for San Juan River at Pagosa Springs, CO?
It depends on the month. In January, half of days historically fall near 53.5 cfs, with the middle 80% of days between 36.7 and 85.4 cfs. The month-by-month table on this page gives the full range.
How long has San Juan River at Pagosa Springs, CO been measured?
Discharge records at USGS site 09342500 begin in 1911, about 115 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for San Juan River at Pagosa Springs, CO?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is San Juan River at Pagosa Springs, CO?
The gauge sits at 37.26553, -107.011, in Colorado, in hydrologic subbasin 14080101, at an elevation of about 7,056 feet, draining roughly 281 square miles.
Can I use San Juan River at Pagosa Springs, CO data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the San Juan River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the San Juan River in full.

Other gauges in this subbasin