Search
Menu

Explore

Hazards

Analysis

Rankings

Reference

Boulder River at Big Timber

Highest listed crest 9.00 ftFlood stage 8.0 ft77 crests since 1947

The Boulder River at Big Timber crested above flood stage 5 times among the 77 crests the National Weather Service lists from 1947 to 2024. The highest, 9.00 ft on June 5, 1997, was minor flooding, 1.00 feet above flood stage.

The gauge

Highest listed crest
9.00 ft
June 5, 1997; 9,940 cubic feet per second
Flood stage
8.0 ft
No major stage set
Crests at major
0
5 above flood stage
Most recent flood crest
June 13, 2022
8.56 ft, minor flooding
Location
Sweet Grass County
Montana

Flood stages

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

Flood categories, Boulder River at Big Timber
Flood stage (minor)8.05Jun 13, 2022Minimal or no property damage, but possibly some public threat

Every listed crest

77 crests from 1947 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Boulder River at Big Timber, 1947 to 2024 456789ft Flood stage 8.0 ft Jun 20, 1947: 6.93 ft, below flood stage; 7,080 cubic feet per secondJun 5, 1948: 7.37 ft, below flood stage; 8,190 cubic feet per secondMay 17, 1949: 5.47 ft, below flood stage; 4,000 cubic feet per secondJun 17, 1950: 6.07 ft, below flood stage; 5,360 cubic feet per secondJun 17, 1951: 5.78 ft, below flood stage; 4,840 cubic feet per secondJun 7, 1952: 6.85 ft, below flood stage; 6,820 cubic feet per secondJun 14, 1953: 6.82 ft, below flood stage; 6,750 cubic feet per secondJun 16, 1955: 5.75 ft, below flood stage; 4,190 cubic feet per secondMay 28, 1956: 7.84 ft, below flood stage; 9,840 cubic feet per secondJun 5, 1957: 6.94 ft, below flood stage; 7,050 cubic feet per secondMay 27, 1958: 5.78 ft, below flood stage; 4,540 cubic feet per secondJun 15, 1959: 7.68 ft, below flood stage; 8,050 cubic feet per secondJun 15, 1960: 6.07 ft, below flood stage; 5,460 cubic feet per secondJun 9, 1961: 5.54 ft, below flood stage; 4,440 cubic feet per secondJun 27, 1962: 6.24 ft, below flood stage; 4,740 cubic feet per secondJun 16, 1963: 7.13 ft, below flood stage; 5,970 cubic feet per secondJun 28, 1964: 7.50 ft, below flood stage; 6,000 cubic feet per secondJun 16, 1965: 7.51 ft, below flood stage; 5,860 cubic feet per secondJun 24, 1965: 7.08 ft, below flood stage; 5,600 cubic feet per secondMay 31, 1966: 6.32 ft, below flood stage; 3,730 cubic feet per secondJun 20, 1968: 7.43 ft, below flood stage; 6,360 cubic feet per secondMay 28, 1969: 6.56 ft, below flood stage; 4,670 cubic feet per secondJun 27, 1970: 7.58 ft, below flood stage; 6,660 cubic feet per secondJun 23, 1971: 7.60 ft, below flood stage; 8,000 cubic feet per secondJun 8, 1972: 6.48 ft, below flood stage; 6,020 cubic feet per secondJun 10, 1973: 6.90 ft, below flood stage; 6,380 cubic feet per secondJun 18, 1974: 7.87 ft, below flood stage; 9,080 cubic feet per secondJul 8, 1975: 8.25 ft, minor floodingJun 10, 1976: 6.18 ft, below flood stage; 5,200 cubic feet per secondJun 9, 1977: 6.06 ft, below flood stage; 4,870 cubic feet per secondJun 10, 1978: 7.39 ft, below flood stage; 6,110 cubic feet per secondJun 14, 1979: 6.83 ft, below flood stage; 5,070 cubic feet per secondMay 23, 1980: 6.70 ft, below flood stage; 4,830 cubic feet per secondJun 7, 1981: 6.91 ft, below flood stage; 5,220 cubic feet per secondJun 29, 1982: 7.44 ft, below flood stage; 7,310 cubic feet per secondJul 10, 1983: 6.70 ft, below flood stage; 5,480 cubic feet per secondJun 30, 1984: 6.58 ft, below flood stage; 5,930 cubic feet per secondJun 8, 1985: 5.81 ft, below flood stage; 4,310 cubic feet per secondJun 6, 1986: 6.52 ft, below flood stage; 5,780 cubic feet per secondMay 17, 1987: 4.66 ft, below flood stage; 2,470 cubic feet per secondJun 5, 1988: 6.36 ft, below flood stage; 5,230 cubic feet per secondJun 16, 1989: 6.47 ft, below flood stage; 5,440 cubic feet per secondJun 11, 1990: 6.11 ft, below flood stage; 4,770 cubic feet per secondJun 12, 1991: 7.60 ft, below flood stage; 6,900 cubic feet per secondJun 20, 1992: 6.11 ft, below flood stage; 3,780 cubic feet per secondJun 22, 1993: 6.23 ft, below flood stage; 3,990 cubic feet per secondMay 13, 1994: 5.88 ft, below flood stage; 4,520 cubic feet per secondJun 15, 1995: 6.74 ft, below flood stage; 4,780 cubic feet per secondJun 10, 1996: 7.47 ft, below flood stage; 6,270 cubic feet per secondJun 5, 1997: 9.00 ft, minor flooding; 9,940 cubic feet per secondJul 3, 1998: 6.01 ft, below flood stage; 4,130 cubic feet per secondJun 22, 1999: 6.63 ft, below flood stage; 5,520 cubic feet per secondJun 8, 2000: 5.65 ft, below flood stage; 3,930 cubic feet per secondMay 15, 2001: 5.19 ft, below flood stage; 3,220 cubic feet per secondJun 2, 2002: 6.65 ft, below flood stage; 5,130 cubic feet per secondMay 30, 2003: 6.86 ft, below flood stage; 5,920 cubic feet per secondJun 10, 2004: 5.25 ft, below flood stage; 3,230 cubic feet per secondJun 23, 2005: 6.41 ft, below flood stage; 5,160 cubic feet per secondJun 9, 2006: 6.02 ft, below flood stage; 4,420 cubic feet per secondJun 7, 2007: 5.60 ft, below flood stage; 3,760 cubic feet per secondJun 5, 2008: 6.80 ft, below flood stage; 5,810 cubic feet per secondJun 21, 2009: 6.57 ft, below flood stage; 5,140 cubic feet per secondJun 5, 2010: 6.32 ft, below flood stage; 4,440 cubic feet per secondJun 30, 2011: 8.04 ft, minor flooding; 9,370 cubic feet per secondJun 6, 2012: 7.03 ft, below flood stage; 5,760 cubic feet per secondJun 12, 2013: 6.80 ft, below flood stage; 4,790 cubic feet per secondMay 29, 2014: 7.71 ft, below flood stage; 6,880 cubic feet per secondJun 2, 2015: 7.17 ft, below flood stage; 5,160 cubic feet per secondJun 10, 2016: 6.74 ft, below flood stage; 4,350 cubic feet per secondJun 6, 2017: 7.26 ft, below flood stage; 5,420 cubic feet per secondMay 27, 2018: 7.64 ft, below flood stage; 6,640 cubic feet per secondJun 7, 2019: 7.60 ft, below flood stage; 6,430 cubic feet per secondJun 1, 2020: 8.33 ft, minor flooding; 10,400 cubic feet per secondJun 6, 2021: 7.44 ft, below flood stage; 7,220 cubic feet per secondJun 13, 2022: 8.56 ft, minor flooding; 11,300 cubic feet per secondJun 3, 2023: 5.97 ft, below flood stage; 4,690 cubic feet per secondJun 11, 2024: 6.74 ft, below flood stage; 6,240 cubic feet per second Highest, 9.00 ft, Jun 5, 1997 19501960197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Boulder River at Big Timber 1940s: 0 1950s: 0 1960s: 0 1970s: 1 1980s: 0 1990s: 1 2000s: 0 2010s: 1 2020s: 2 2 1940s1950s1960s1970s1980s1990s2000s2010s2020s
  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

The 50 highest of 77 listed crests.

Highest listed crests, Boulder River at Big Timber
1Jun 5, 19979.00+1.00Minor9,940
2Jun 13, 20228.56+0.56Minor11,300
3Jun 1, 20208.33+0.33Minor10,400
4Jul 8, 19758.25+0.25Minor—
5Jun 30, 20118.04+0.04Minor9,370
6Jun 18, 19747.87−0.13Below flood stage9,080
7May 28, 19567.84−0.16Below flood stage9,840
8May 29, 20147.71−0.29Below flood stage6,880
9Jun 15, 19597.68−0.32Below flood stage8,050
10May 27, 20187.64−0.36Below flood stage6,640
11Jun 23, 19717.60−0.40Below flood stage8,000
12Jun 12, 19917.60−0.40Below flood stage6,900
13Jun 7, 20197.60−0.40Below flood stage6,430
14Jun 27, 19707.58−0.42Below flood stage6,660
15Jun 16, 19657.51−0.49Below flood stage5,860
16Jun 28, 19647.50−0.50Below flood stage6,000
17Jun 10, 19967.47−0.53Below flood stage6,270
18Jun 29, 19827.44−0.56Below flood stage7,310
19Jun 6, 20217.44−0.56Below flood stage7,220
20Jun 20, 19687.43−0.57Below flood stage6,360
21Jun 10, 19787.39−0.61Below flood stage6,110
22Jun 5, 19487.37−0.63Below flood stage8,190
23Jun 6, 20177.26−0.74Below flood stage5,420
24Jun 2, 20157.17−0.83Below flood stage5,160
25Jun 16, 19637.13−0.87Below flood stage5,970
26Jun 24, 19657.08−0.92Below flood stage5,600
27Jun 6, 20127.03−0.97Below flood stage5,760
28Jun 5, 19576.94−1.06Below flood stage7,050
29Jun 20, 19476.93−1.07Below flood stage7,080
30Jun 7, 19816.91−1.09Below flood stage5,220
31Jun 10, 19736.90−1.10Below flood stage6,380
32May 30, 20036.86−1.14Below flood stage5,920
33Jun 7, 19526.85−1.15Below flood stage6,820
34Jun 14, 19796.83−1.17Below flood stage5,070
35Jun 14, 19536.82−1.18Below flood stage6,750
36Jun 5, 20086.80−1.20Below flood stage5,810
37Jun 12, 20136.80−1.20Below flood stage4,790
38Jun 15, 19956.74−1.26Below flood stage4,780
39Jun 10, 20166.74−1.26Below flood stage4,350
40Jun 11, 20246.74−1.26Below flood stage6,240
41May 23, 19806.70−1.30Below flood stage4,830
42Jul 10, 19836.70−1.30Below flood stage5,480
43Jun 2, 20026.65−1.35Below flood stage5,130
44Jun 22, 19996.63−1.37Below flood stage5,520
45Jun 30, 19846.58−1.42Below flood stage5,930
46Jun 21, 20096.57−1.43Below flood stage5,140
47May 28, 19696.56−1.44Below flood stage4,670
48Jun 6, 19866.52−1.48Below flood stage5,780
49Jun 8, 19726.48−1.52Below flood stage6,020
50Jun 16, 19896.47−1.53Below flood stage5,440

Sweet Grass County: every hazard · River floods across the country · Montana

NOAA National Water Prediction Service, gauge BTMM8, 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.