What species are stocked in Hassler Reservoir?

On record: Rainbow Trout. Source: Montana Fish, Wildlife & Parks.

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Montana stocking report

Hassler Reservoir

49 records Last reported: May 2, 2014

Last reported stocking

The latest reported stocking at Hassler Reservoir was on May 2, 2014: 200 Rainbow Trout (6.93 in avg).

Record last checked: 2026-07-24. This is not a stocking date.

Browse stocking history

Source: Montana Fish, Wildlife & Parks.

A schedule is a plan, not confirmation that fish were released. Stocking records do not guarantee fish are still available.

No current or upcoming schedule is in this archive. Check the official report before choosing a trip date.

County: Fergus
Species on record: Rainbow Trout
Records: 49 records
Official source: Montana Fish, Wildlife & Parks report

Location map

Hassler Reservoir location context

Agency coordinates · access unverified

Hassler ReservoirAgency coordinates Holgate ReservoirAgency coordinates Lower Frog PondAgency coordinates Upper Frog PondAgency coordinates Olsen PondAgency coordinates

Pins appear only when the record includes coordinates; they are not verified access points. Shaded counties show area context only. Waters without coordinates stay in the list without a pin; confirm access and directions with the official agency source.

Before you go

Plan a trip to Hassler Reservoir

Check the latest report

Confirm dates and any changes in the official stocking report. Historical schedules are kept below even after their planned dates pass.

Check access and fishing rules

Use Montana's official fishing information to find current guidance. Confirm the exact water, public access, closures, and applicable fishing rules before leaving.

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The map gives location context. A shaded county is area context, not directions to a fishing spot or evidence of public access.

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Agency records

Stocking history

49 records from May 18, 1965 to May 2, 2014. Open a year to browse its records; scroll tables sideways for all columns. Scheduled means planned, even when the date has passed. Blank fields mean the source did not publish that detail.

2014 1 record

2014 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 2, 2014 reported	Rainbow Trout	200	6.93 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2013 1 record

2013 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 17, 2013 reported	Rainbow Trout	200	7.75 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2012 1 record

2012 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 16, 2012 reported	Rainbow Trout	203	7 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2011 1 record

2011 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 17, 2011 reported	Rainbow Trout	201	7.11 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2010 1 record

2010 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 17, 2010 reported	Rainbow Trout	201	7.61 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2009 1 record

2009 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 19, 2009 reported	Rainbow Trout	201	8 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2008 1 record

2008 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 7, 2008 reported	Rainbow Trout	196	7.74 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2006 2 records

2006 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 4, 2006 reported	Rainbow Trout	47	8.47 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks
May 4, 2006 reported	Rainbow Trout	163	6.96 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2005 1 record

2005 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 24, 2005 reported	Rainbow Trout	978	3.52 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2004 1 record

2004 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 16, 2004 reported	Rainbow Trout	984	4.55 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2003 1 record

2003 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 28, 2003 reported	Rainbow Trout	994	3.69 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2002 1 record

2002 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 6, 2002 reported	Rainbow Trout	998	4.2 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2001 1 record

2001 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 22, 2001 reported	Rainbow Trout	996	3.8000000000000003 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

2000 1 record

2000 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 6, 2000 reported	Rainbow Trout	1,002	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1999 1 record

1999 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 26, 1999 reported	Rainbow Trout	1,021	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1998 1 record

1998 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 4, 1998 reported	Rainbow Trout	1,026	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1997 1 record

1997 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 3, 1997 reported	Rainbow Trout	1,050	4.1 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1996 1 record

1996 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 21, 1996 reported	Rainbow Trout	1,056	5.1000000000000005 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1995 1 record

1995 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 3, 1995 reported	Rainbow Trout	1,100	3.9 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1994 1 record

1994 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 2, 1994 reported	Rainbow Trout	1,022	4.3 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1993 1 record

1993 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 3, 1993 reported	Rainbow Trout	1,007	4.7 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1992 1 record

1992 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 27, 1992 reported	Rainbow Trout	1,065	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1991 1 record

1991 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 7, 1991 reported	Rainbow Trout	1,000	4.5 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1990 1 record

1990 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 19, 1990 reported	Rainbow Trout	1,085	4.2 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1989 1 record

1989 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 19, 1989 reported	Rainbow Trout	979	4.2 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1988 1 record

1988 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 20, 1988 reported	Rainbow Trout	1,000	4.3 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1987 1 record

1987 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 6, 1987 reported	Rainbow Trout	1,541	3.8000000000000003 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1986 1 record

1986 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 21, 1986 reported	Rainbow Trout	1,502	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1985 1 record

1985 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 17, 1985 reported	Rainbow Trout	1,501	5 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1984 1 record

1984 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 20, 1984 reported	Rainbow Trout	1,504	7 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1983 1 record

1983 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 25, 1983 reported	Rainbow Trout	1,020	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1982 1 record

1982 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
May 6, 1982 reported	Rainbow Trout	1,504	5 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1981 1 record

1981 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 16, 1981 reported	Rainbow Trout	1,028	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1980 1 record

1980 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 17, 1980 reported	Rainbow Trout	1,526	6 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1979 1 record

1979 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 6, 1979 reported	Rainbow Trout	1,500	5 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1978 1 record

1978 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 15, 1978 reported	Rainbow Trout	1,530	6 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1977 1 record

1977 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 19, 1977 reported	Rainbow Trout	1,508	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1976 1 record

1976 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 21, 1976 reported	Rainbow Trout	1,512	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1975 1 record

1975 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
June 24, 1975 reported	Rainbow Trout	1,500	5 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1974 1 record

1974 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 8, 1974 reported	Rainbow Trout	1,550	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1973 2 records

1973 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
August 15, 1973 reported	Rainbow Trout	484	11 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks
April 4, 1973 reported	Rainbow Trout	1,536	4 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1972 1 record

1972 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
November 12, 1972 reported	Rainbow Trout	1,168	6 in avg	Giant Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1967 1 record

1967 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
April 24, 1967 reported	Rainbow Trout	1,500	5 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1966 2 records

1966 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
August 3, 1966 reported	Rainbow Trout	979	8 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks
April 18, 1966 reported	Rainbow Trout	875	9 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

1965 2 records

1965 stocking records and official sources
Date / status	Species	Fish	Size	Hatchery	Source
August 10, 1965 reported	Rainbow Trout	1,000	7 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks
May 18, 1965 reported	Rainbow Trout	501	8 in avg	Big Springs Trout Hatchery	Montana Fish, Wildlife & Parks

Records retain the dates, quantities, and status supplied by the linked agencies. An event missing here does not mean the water was not stocked - some plants go unreported or are published elsewhere.

Grouped by county and sorted by latest record, not by driving distance. Confirm access for each water.

Data source: Montana Fish, Wildlife & Parks. A record for this water was last checked on 2026-07-24. This check date is not a stocking date.

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