Northern Pacific Reservoir Fish Stocking
Montana · 1933–1967 on record
According to Montana fish & wildlife agency, Northern Pacific Reservoir was last stocked May 9, 1967 with Rainbow Trout. Northern Pacific Reservoir has 14 stocking records on file, spanning 1933–1967, with about 157,960 fish stocked over that period.
When Northern Pacific Reservoir is stocked
Northern Pacific Reservoir is typically stocked in summer, most often in May — 5 stocking events in that peak month.
Nearby stocked waters
Other stocked waters near Northern Pacific Reservoir, freshest activity first.
Willow Creek Reservoir
8 mi5 species · 460 records
Last stocked June 2026
Helena Valley Regulating Reservoir
6 mi2 species · 80 records
Last stocked May 2026
Rock Creek
6 mi6 species · 595 records
Last stocked May 2013
Johnson Pond
6 mi2 species · 39 records
Last stocked June 1999
Maupin Creek
5 mi2 species · 9 records
Last stocked July 1970
Combo Pond
7 mi1 species · 1 records
Last stocked July 1970
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| May 9, 1967 | Rainbow Trout | 1,500 | 9" | Montana fish & wildlife agency |
| July 7, 1966 | Rainbow Trout | 1,100 | 9" | Montana fish & wildlife agency |
| May 18, 1966 | Rainbow Trout | 2,200 | 8" | Montana fish & wildlife agency |
| June 1, 1965 | Rainbow Trout | 3,003 | 9" | Montana fish & wildlife agency |
| May 23, 1964 | Arctic Grayling | 1,316 | 9" | Montana fish & wildlife agency |
| May 15, 1964 | Rainbow Trout | 3,005 | 8" | Montana fish & wildlife agency |
| May 29, 1963 | Rainbow Trout | 3,006 | 9" | Montana fish & wildlife agency |
| August 2, 1962 | Rainbow Trout | 1,400 | 10" | Montana fish & wildlife agency |
Show 6 more stocking records →
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| August 2, 1962 | Rainbow Trout | 1,680 | 10" | Montana fish & wildlife agency |
| July 25, 1962 | Rainbow Trout | 1,750 | 10" | Montana fish & wildlife agency |
| June 9, 1937 | Brown Trout | 40,000 | 0 | Montana fish & wildlife agency |
| June 8, 1937 | Brown Trout | 64,000 | 0 | Montana fish & wildlife agency |
| June 2, 1934 | Arctic Grayling | 14,000 | 0 | Montana fish & wildlife agency |
| October 13, 1933 | Rainbow Trout | 20,000 | 2" | Montana fish & wildlife agency |
Frequently asked
When was Northern Pacific Reservoir last stocked?
According to Montana fish & wildlife agency, Northern Pacific Reservoir was last stocked May 9, 1967 with Rainbow Trout.
What fish species are stocked in Northern Pacific Reservoir?
Northern Pacific Reservoir is stocked with Rainbow Trout, Arctic Grayling, and Brown Trout.
What time of year is Northern Pacific Reservoir stocked?
Northern Pacific Reservoir is typically stocked in summer, most often in May.
How often is Northern Pacific Reservoir stocked?
Northern Pacific Reservoir is stocked intermittently — 14 recorded stockings between 1933 and 1967.
How many fish have been stocked in Northern Pacific Reservoir?
About 157,960 fish have been stocked in Northern Pacific Reservoir across 14 recorded events since 1933, per Montana fish & wildlife agency.
What size are the fish stocked in Northern Pacific Reservoir?
Fish stocked in Northern Pacific Reservoir average about 8.5 inches, based on the sizes the agency reported.