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Llano River at Llano

Highest listed crest 41.50 ftFlood stage 10.0 ft17 crests since 1935

The Llano River at Llano crested at major flood stage 6 times among the 17 crests the National Weather Service lists from 1935 to 2026. The highest, 41.50 ft on June 14, 1935, was major flooding, 31.50 feet above flood stage.

The gauge

Highest listed crest
41.50 ft
June 14, 1935; 380,000 cubic feet per second
Flood stage
10.0 ft
Major flooding from 23.0 ft
Crests at major
6
111th of 370 gauges in Texas
Most recent flood crest
July 16, 2026
20.30 ft, moderate flooding
Location
Llano County
Texas

Flood stages

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

Flood categories, Llano River at Llano
Action stage10.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)10.01Jul 6, 2002Minimal or no property damage, but possibly some public threat
Moderate flood stage12.07Jul 16, 2026Some inundation of structures and roads near the stream
Major flood stage23.06Jul 4, 2025Extensive inundation of structures and roads

Every listed crest

17 crests from 1935 to 2026. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Llano River at Llano, 1935 to 2026 01020304050ft Flood stage 10.0 ftMajor 23.0 ft Jun 14, 1935: 41.50 ft, major flooding; 380,000 cubic feet per secondSep 10, 1952: 32.60 ft, major flooding; 232,000 cubic feet per secondFeb 4, 1992: 20.51 ft, moderate flooding; 83,700 cubic feet per secondJun 23, 1997: 39.10 ft, major flooding; 260,000 cubic feet per secondNov 4, 2000: 28.65 ft, major floodingJul 6, 2002: 11.24 ft, minor floodingNov 17, 2004: 22.07 ft, moderate flooding; 88,215 cubic feet per secondJun 27, 2007: 20.50 ft, moderate flooding; 75,916 cubic feet per secondMay 29, 2015: 12.13 ft, moderate flooding; 27,071 cubic feet per secondJun 1, 2016: 12.63 ft, moderate flooding; 29,253 cubic feet per secondOct 16, 2018: 40.14 ft, major flooding; 278,000 cubic feet per secondJun 4, 2021: 4.09 ft, below flood stage; 1,620 cubic feet per secondSep 1, 2022: 6.91 ft, below flood stage; 7,730 cubic feet per secondMay 21, 2023: 4.06 ft, below flood stage; 1,470 cubic feet per secondJul 23, 2024: 17.39 ft, moderate flooding; 58,600 cubic feet per secondJul 4, 2025: 27.07 ft, major flooding; 132,000 cubic feet per secondJul 16, 2026: 20.30 ft, moderate flooding Highest, 41.50 ft, Jun 14, 1935 19401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Llano River at Llano 1930s: 1 1940s: 0 1950s: 1 1960s: 0 1970s: 0 1980s: 0 1990s: 2 2000s: 4 4 2010s: 3 2020s: 3 1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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, Llano River at Llano
1Jun 14, 193541.50+31.50Major380,000
2Oct 16, 201840.14+30.14Major278,000
3Jun 23, 199739.10+29.10Major260,000
4Sep 10, 195232.60+22.60Major232,000
5Nov 4, 200028.65+18.65Major—
6Jul 4, 202527.07+17.07Major132,000
7Nov 17, 200422.07+12.07Moderate88,215
8Feb 4, 199220.51+10.51Moderate83,700
9Jun 27, 200720.50+10.50Moderate75,916
10Jul 16, 202620.30+10.30Moderate—
11Jul 23, 202417.39+7.39Moderate58,600
12Jun 1, 201612.63+2.63Moderate29,253
13May 29, 201512.13+2.13Moderate27,071
14Jul 6, 200211.24+1.24Minor—
15Sep 1, 20226.91−3.09Below flood stage7,730
16Jun 4, 20214.09−5.91Below flood stage1,620
17May 21, 20234.06−5.94Below flood stage1,470

The worst floods along the Llano River

For this gauge's highest crests, the other gauges on the Llano River that crested above flood stage within a week.

October 16, 2018: 40.14 ft here, major flooding

  • MasonTX · Oct 16, 2018 · 34.21 ft · Major
  • JunctionTX · Oct 16, 2018 · 28.39 ft · Moderate

November 4, 2000: 28.65 ft here, major flooding

  • JunctionTX · Nov 3, 2000 · 35.08 ft · Major · its highest
  • MasonTX · Nov 4, 2000 · 32.00 ft · Major

Gauges on the Llano River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Llano River
JunctionTX16.035.08 ft, Nov 3, 20003
MasonTX18.037.00 ft, Sep 8, 19805
Llano this gaugeTX10.041.50 ft, Jun 14, 19356

Other gauges in Llano County

Flood gauges in Llano County
Kingsland12.034.20 ft, Sep 11, 19522
Willow City8.012.43 ft, Jun 27, 20070

Llano County: every hazard · River floods across the country · Texas

NOAA National Water Prediction Service, gauge LLAT2, 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.