Bonanza Reservoir Fish Stocking
Montana · 1958–2026 on record
According to Montana fish & wildlife agency, Bonanza Reservoir was last stocked May 27, 2026 with Rainbow Trout. Bonanza Reservoir has 66 stocking records on file, spanning 1958–2026, with about 56,867 fish stocked over that period.
When Bonanza Reservoir is stocked
Bonanza Reservoir is typically stocked in summer, most often in June — 39 stocking events in that peak month.
Nearby stocked waters
Other stocked waters near Bonanza Reservoir, freshest activity first.
Hundred Dollar Bill Pond
13 mi1 species · 5 records
Last stocked June 2026
Bair Reservoir
9 mi4 species · 148 records
Last stocked June 2026
Rostad Reservoir
8 mi1 species · 43 records
Last stocked June 2013
Flagstaff Reservoir
6 mi1 species · 1 records
Last stocked July 1999
Duck Creek
12 mi4 species · 92 records
Last stocked October 1986
Bonanza Creek
3 mi2 species · 12 records
Last stocked June 1953
By species
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| May 27, 2026 | Rainbow Trout | 507 | 4.55" | Montana fish & wildlife agency |
| June 4, 2025 | Rainbow Trout | 499 | 4.99" | Montana fish & wildlife agency |
| May 29, 2024 | Rainbow Trout | 503 | 4.51" | Montana fish & wildlife agency |
| June 1, 2023 | Rainbow Trout | 520 | 4.58" | Montana fish & wildlife agency |
| June 16, 2022 | Rainbow Trout | 507 | 4.69" | Montana fish & wildlife agency |
| June 11, 2021 | Rainbow Trout | 498 | 5.15" | Montana fish & wildlife agency |
| June 4, 2020 | Rainbow Trout | 498 | 4.27" | Montana fish & wildlife agency |
| May 29, 2019 | Rainbow Trout | 507 | 4.5" | Montana fish & wildlife agency |
Show 42 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| June 6, 2018 | Rainbow Trout | 511 | 4.42" | Montana fish & wildlife agency |
| May 15, 2017 | Rainbow Trout | 526 | 3.56" | Montana fish & wildlife agency |
| June 8, 2016 | Rainbow Trout | 500 | 4.47" | Montana fish & wildlife agency |
| May 27, 2015 | Rainbow Trout | 500 | 4.27" | Montana fish & wildlife agency |
| May 28, 2014 | Rainbow Trout | 514 | 4.12" | Montana fish & wildlife agency |
| June 7, 2012 | Rainbow Trout | 504 | 4.52" | Montana fish & wildlife agency |
| June 16, 2011 | Rainbow Trout | 497 | 4.61" | Montana fish & wildlife agency |
| June 7, 2010 | Rainbow Trout | 500 | 4.24" | Montana fish & wildlife agency |
| June 3, 2009 | Rainbow Trout | 500 | 4" | Montana fish & wildlife agency |
| June 18, 2008 | Rainbow Trout | 496 | 4.93" | Montana fish & wildlife agency |
| June 11, 2007 | Rainbow Trout | 499 | 4.44" | Montana fish & wildlife agency |
| June 7, 2006 | Rainbow Trout | 548 | 4.04" | Montana fish & wildlife agency |
| May 25, 2005 | Rainbow Trout | 518 | 3.51" | Montana fish & wildlife agency |
| June 7, 2004 | Rainbow Trout | 489 | 4.05" | Montana fish & wildlife agency |
| May 28, 2003 | Rainbow Trout | 497 | 3.69" | Montana fish & wildlife agency |
| June 5, 2002 | Rainbow Trout | 519 | 4.2" | Montana fish & wildlife agency |
| June 20, 2001 | Rainbow Trout | 515 | 4.3" | Montana fish & wildlife agency |
| June 8, 2000 | Rainbow Trout | 506 | 4.26" | Montana fish & wildlife agency |
| May 27, 1999 | Rainbow Trout | 529 | 4" | Montana fish & wildlife agency |
| June 3, 1998 | Rainbow Trout | 586 | 3.7" | Montana fish & wildlife agency |
| June 16, 1997 | Rainbow Trout | 549 | 4.2" | Montana fish & wildlife agency |
| June 12, 1996 | Rainbow Trout | 498 | 4.1" | Montana fish & wildlife agency |
| June 2, 1995 | Rainbow Trout | 514 | 4.1" | Montana fish & wildlife agency |
| June 15, 1994 | Rainbow Trout | 525 | 4.2" | Montana fish & wildlife agency |
| June 14, 1993 | Rainbow Trout | 510 | 3.9" | Montana fish & wildlife agency |
| May 26, 1992 | Rainbow Trout | 511 | 3.9" | Montana fish & wildlife agency |
| June 11, 1991 | Rainbow Trout | 500 | 4.5" | Montana fish & wildlife agency |
| June 15, 1990 | Rainbow Trout | 522 | 4.4" | Montana fish & wildlife agency |
| June 6, 1989 | Rainbow Trout | 517 | 5.5" | Montana fish & wildlife agency |
| June 6, 1988 | Rainbow Trout | 500 | 4.8" | Montana fish & wildlife agency |
| June 4, 1987 | Rainbow Trout | 538 | 4.6" | Montana fish & wildlife agency |
| June 18, 1986 | Rainbow Trout | 507 | 5" | Montana fish & wildlife agency |
| May 14, 1985 | Rainbow Trout | 514 | 4" | Montana fish & wildlife agency |
| June 8, 1984 | Rainbow Trout | 503 | 4" | Montana fish & wildlife agency |
| June 2, 1983 | Rainbow Trout | 522 | 4" | Montana fish & wildlife agency |
| June 23, 1981 | Rainbow Trout | 554 | 5" | Montana fish & wildlife agency |
| June 24, 1980 | Rainbow Trout | 504 | 6" | Montana fish & wildlife agency |
| July 3, 1979 | Rainbow Trout | 501 | 5" | Montana fish & wildlife agency |
| July 26, 1978 | Rainbow Trout | 506 | 6" | Montana fish & wildlife agency |
| June 2, 1977 | Rainbow Trout | 510 | 5" | Montana fish & wildlife agency |
| May 18, 1976 | Rainbow Trout | 532 | 4" | Montana fish & wildlife agency |
| June 11, 1974 | Rainbow Trout | 504 | 5" | Montana fish & wildlife agency |
Showing 50 of 66 stocking records.
Frequently asked
When was Bonanza Reservoir last stocked?
According to Montana fish & wildlife agency, Bonanza Reservoir was last stocked May 27, 2026 with Rainbow Trout.
What fish species are stocked in Bonanza Reservoir?
Bonanza Reservoir is stocked with Rainbow Trout.
What time of year is Bonanza Reservoir stocked?
Bonanza Reservoir is typically stocked in summer, most often in June.
How often is Bonanza Reservoir stocked?
Bonanza Reservoir is stocked intermittently — 66 recorded stockings between 1958 and 2026.
How many fish have been stocked in Bonanza Reservoir?
About 56,867 fish have been stocked in Bonanza Reservoir across 66 recorded events since 1958, per Montana fish & wildlife agency.
What size are the fish stocked in Bonanza Reservoir?
Fish stocked in Bonanza Reservoir average about 4.4 inches, based on the sizes the agency reported.