Castle Rock Reservoir Fish Stocking
Montana · 1976–2025 on record
According to Montana fish & wildlife agency, Castle Rock Reservoir was last stocked June 19, 2025 with Walleye. Castle Rock Reservoir has 58 stocking records on file, spanning 1976–2025, with about 1,682,998 fish stocked over that period.
When Castle Rock Reservoir is stocked
Castle Rock Reservoir is typically stocked in summer, most often in June — 37 stocking events in that peak month.
Nearby stocked waters
Other stocked waters near Castle Rock Reservoir, freshest activity first.
Green Leaf Pond
18 mi2 species · 52 records
Last stocked June 2008
Philbrick #1
17 mi2 species · 4 records
Last stocked July 2003
Farley Pond
18 mi1 species · 1 records
Last stocked July 1983
Hays Reservoir
16 mi1 species · 7 records
Last stocked April 1982
Colstrip Pond 3
2 mi7 species · 46 records
Last stocked August 1979
Philbrick #3
16 mi1 species · 1 records
Last stocked June 1978
By species
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| June 19, 2025 | Walleye | 1,000 | 1.29" | Montana fish & wildlife agency |
| June 11, 2024 | Walleye | 1,000 | 1.39" | Montana fish & wildlife agency |
| July 12, 2023 | Walleye | 1,000 | 2.01" | Montana fish & wildlife agency |
| June 15, 2022 | Walleye | 1,000 | 1.13" | Montana fish & wildlife agency |
| September 30, 2021 | Channel Catfish | 8,227 | 1.57" | Montana fish & wildlife agency |
| August 20, 2021 | Channel Catfish | 1,000 | 1.69" | Montana fish & wildlife agency |
| June 28, 2021 | Walleye | 1,000 | 1.76" | Montana fish & wildlife agency |
| August 19, 2020 | Channel Catfish | 1,000 | 1.61" | Montana fish & wildlife agency |
Show 42 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| June 10, 2020 | Walleye | 2,000 | 2.79" | Montana fish & wildlife agency |
| June 19, 2019 | Walleye | 1,000 | 1.59" | Montana fish & wildlife agency |
| August 3, 2018 | Smallmouth Bass | 4,000 | 2.19" | Montana fish & wildlife agency |
| June 24, 2018 | Walleye | 1,000 | 1.7" | Montana fish & wildlife agency |
| August 22, 2017 | Channel Catfish | 1,000 | 2" | Montana fish & wildlife agency |
| June 14, 2017 | Walleye | 1,000 | 1.51" | Montana fish & wildlife agency |
| June 14, 2016 | Walleye | 1,000 | 1.34" | Montana fish & wildlife agency |
| July 22, 2015 | Channel Catfish | 1,000 | 2.5" | Montana fish & wildlife agency |
| June 16, 2015 | Walleye | 1,000 | 2" | Montana fish & wildlife agency |
| September 2, 2014 | Smallmouth Bass | 4,000 | 2.49" | Montana fish & wildlife agency |
| June 24, 2014 | Walleye | 1,000 | 1.25" | Montana fish & wildlife agency |
| June 11, 2013 | Walleye | 1,000 | 1.5" | Montana fish & wildlife agency |
| June 11, 2012 | Walleye | 1,000 | 1.49" | Montana fish & wildlife agency |
| June 21, 2011 | Walleye | 1,000 | 1.12" | Montana fish & wildlife agency |
| June 22, 2010 | Walleye | 1,000 | 1.5" | Montana fish & wildlife agency |
| June 24, 2009 | Walleye | 1,049 | 2" | Montana fish & wildlife agency |
| June 17, 2008 | Walleye | 1,100 | 1.2" | Montana fish & wildlife agency |
| June 12, 2007 | Walleye | 1,000 | 1.5" | Montana fish & wildlife agency |
| June 7, 2006 | Walleye | 1,000 | 1" | Montana fish & wildlife agency |
| June 14, 2005 | Walleye | 1,000 | 1.2" | Montana fish & wildlife agency |
| July 22, 2004 | Walleye | 1,000 | 2.2" | Montana fish & wildlife agency |
| June 11, 2003 | Walleye | 1,000 | 1.1" | Montana fish & wildlife agency |
| June 19, 2002 | Walleye | 1,000 | 1.2" | Montana fish & wildlife agency |
| June 7, 2001 | Walleye | 1,000 | 1.1" | Montana fish & wildlife agency |
| October 23, 2000 | Channel Catfish | 8,000 | 2.3" | Montana fish & wildlife agency |
| June 12, 2000 | Walleye | 1,000 | 1.2" | Montana fish & wildlife agency |
| June 17, 1999 | Walleye | 1,000 | 1.2" | Montana fish & wildlife agency |
| June 11, 1998 | Walleye | 1,000 | 1.3" | Montana fish & wildlife agency |
| June 11, 1997 | Walleye | 1,000 | 1.2" | Montana fish & wildlife agency |
| June 17, 1996 | Walleye | 5,040 | 1.4" | Montana fish & wildlife agency |
| June 8, 1995 | Walleye | 5,000 | 1.1" | Montana fish & wildlife agency |
| June 6, 1994 | Walleye | 5,000 | 1.3" | Montana fish & wildlife agency |
| June 4, 1993 | Walleye | 5,000 | 1.3" | Montana fish & wildlife agency |
| June 9, 1992 | Walleye | 5,000 | 1.1" | Montana fish & wildlife agency |
| July 29, 1991 | Smallmouth Bass | 912 | 6.2" | Montana fish & wildlife agency |
| July 29, 1991 | Smallmouth Bass | 1,600 | 5" | Montana fish & wildlife agency |
| July 26, 1991 | Smallmouth Bass | 3,970 | 1.7" | Montana fish & wildlife agency |
| June 18, 1991 | Walleye | 5,000 | 1.7" | Montana fish & wildlife agency |
| June 12, 1990 | Walleye | 5,000 | 1.2" | Montana fish & wildlife agency |
| June 19, 1989 | Walleye | 5,000 | 1.8" | Montana fish & wildlife agency |
| April 21, 1988 | Walleye | 50,000 | 0.2" | Montana fish & wildlife agency |
| June 24, 1986 | Walleye | 1,000 | 2" | Montana fish & wildlife agency |
Showing 50 of 58 stocking records.
Frequently asked
When was Castle Rock Reservoir last stocked?
According to Montana fish & wildlife agency, Castle Rock Reservoir was last stocked June 19, 2025 with Walleye.
What fish species are stocked in Castle Rock Reservoir?
Castle Rock Reservoir is stocked with Walleye, Channel Catfish, Smallmouth Bass, Northern Pike, Fathead Minnow, Largemouth Bass, and Crappie.
What time of year is Castle Rock Reservoir stocked?
Castle Rock Reservoir is typically stocked in summer, most often in June.
How often is Castle Rock Reservoir stocked?
Castle Rock Reservoir is stocked intermittently — 58 recorded stockings between 1976 and 2025.
How many fish have been stocked in Castle Rock Reservoir?
About 1,682,998 fish have been stocked in Castle Rock Reservoir across 58 recorded events since 1976, per Montana fish & wildlife agency.
What size are the fish stocked in Castle Rock Reservoir?
Fish stocked in Castle Rock Reservoir average about 1.8 inches, based on the sizes the agency reported.