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South Fork Rio Grande at South Fork

Highest listed crest 9.70 ftFlood stage 7.0 ft19 crests since 1911

The South Fork Rio Grande at South Fork crested at major flood stage 1 time among the 19 crests the National Weather Service lists from 1911 to 2025. The highest, 9.70 ft on October 15, 1911, was major flooding, 2.70 feet above flood stage.

The gauge

Highest listed crest
9.70 ft
October 15, 1911; 8,000 cubic feet per second
Flood stage
7.0 ft
Major flooding from 8.5 ft
Crests at major
1
6th of 100 gauges in Colorado
Most recent flood crest
October 14, 2025
7.63 ft, moderate flooding
Location
Rio Grande County
Colorado

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, South Fork Rio Grande at South Fork
Action stage6.014Jun 13, 2019The level at which the NWS or its partners begin to take action
Flood stage (minor)7.00—Minimal or no property damage, but possibly some public threat
Moderate flood stage7.51Oct 14, 2025Some inundation of structures and roads near the stream
Major flood stage8.51Oct 15, 1911Extensive inundation of structures and roads

Every listed crest

19 crests from 1911 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the South Fork Rio Grande at South Fork, 1911 to 2025 246810ft Flood stage 7.0 ftMajor 8.5 ft Oct 15, 1911: 9.70 ft, major flooding; 8,000 cubic feet per secondJun 16, 1917: 4.05 ft, below flood stage; 2,540 cubic feet per secondMay 21, 1920: 4.02 ft, below flood stage; 3,040 cubic feet per secondJun 11, 1921: 3.55 ft, below flood stage; 2,540 cubic feet per secondJun 3, 1948: 6.50 ft, action stage; 3,080 cubic feet per secondJun 18, 1949: 6.83 ft, action stage; 3,420 cubic feet per secondJun 10, 1952: 6.68 ft, action stage; 3,310 cubic feet per secondJun 10, 1957: 6.10 ft, action stage; 2,580 cubic feet per secondJun 12, 1973: 6.09 ft, action stage; 2,640 cubic feet per secondJun 15, 1979: 6.59 ft, action stage; 2,690 cubic feet per secondJun 10, 1980: 6.22 ft, action stage; 2,700 cubic feet per secondMay 24, 1984: 6.91 ft, action stage; 3,690 cubic feet per secondJun 8, 1985: 6.57 ft, action stage; 2,930 cubic feet per secondJun 7, 1986: 6.23 ft, action stage; 2,630 cubic feet per secondMay 28, 1993: 6.19 ft, action stage; 2,540 cubic feet per secondJun 17, 1995: 6.86 ft, action stage; 2,990 cubic feet per secondMay 24, 2005: 6.83 ft, action stage; 3,000 cubic feet per secondJun 13, 2019: 6.50 ft, action stage; 2,440 cubic feet per secondOct 14, 2025: 7.63 ft, moderate flooding; 3,370 cubic feet per second Highest, 9.70 ft, Oct 15, 1911 192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, South Fork Rio Grande at South Fork 1910s: 1 1 1920s: 0 1930s: 0 1940s: 0 1950s: 0 1960s: 0 1970s: 0 1980s: 0 1990s: 0 2000s: 0 2010s: 0 2020s: 1 1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, South Fork Rio Grande at South Fork
1Oct 15, 19119.70+2.70Major8,000
2Oct 14, 20257.63+0.63Moderate3,370
3May 24, 19846.91−0.09Action3,690
4Jun 17, 19956.86−0.14Action2,990
5Jun 18, 19496.83−0.17Action3,420
6May 24, 20056.83−0.17Action3,000
7Jun 10, 19526.68−0.32Action3,310
8Jun 15, 19796.59−0.41Action2,690
9Jun 8, 19856.57−0.43Action2,930
10Jun 3, 19486.50−0.50Action3,080
11Jun 13, 20196.50−0.50Action2,440
12Jun 7, 19866.23−0.77Action2,630
13Jun 10, 19806.22−0.78Action2,700
14May 28, 19936.19−0.81Action2,540
15Jun 10, 19576.10−0.90Action2,580
16Jun 12, 19736.09−0.91Action2,640
17Jun 16, 19174.05−2.95Below flood stage2,540
18May 21, 19204.02−2.98Below flood stage3,040
19Jun 11, 19213.55−3.45Below flood stage2,540

Other gauges in Rio Grande County

Flood gauges in Rio Grande County
Del Norte5.56.80 ft, Oct 5, 19110

Rio Grande County: every hazard · River floods across the country · Colorado

NOAA National Water Prediction Service, gauge SRGC2, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.