Olson Reservoir Fish Stocking
Montana · 1966–1970 on record
According to Montana fish & wildlife agency, Olson Reservoir was last stocked June 24, 1970 with Rainbow Trout. Olson Reservoir has 6 stocking records on file, spanning 1966–1970, with about 19,504 fish stocked over that period.
When Olson Reservoir is stocked
Nearby stocked waters
Other stocked waters near Olson Reservoir, freshest activity first.
Holgate Reservoir
13 mi3 species · 54 records
Last stocked June 2026
Carpenter Reservoir
8 mi2 species · 36 records
Last stocked May 2026
Wolf Crk Ranch Pond, Upper
11 mi3 species · 18 records
Last stocked May 2026
Kingsbury Pond
4 mi4 species · 55 records
Last stocked July 2025
Anderson Pond
12 mi3 species · 18 records
Last stocked June 2025
Urs Pond
9 mi2 species · 66 records
Last stocked June 2023
By species
Stocking history
Most recent stockings first. Dates shown at the precision the agency reported.
| Date | Species | Number | Size | Source |
|---|---|---|---|---|
| June 24, 1970 | Rainbow Trout | 1,050 | 5" | Montana fish & wildlife agency |
| May 27, 1970 | Rainbow Trout | 3,750 | 3" | Montana fish & wildlife agency |
| June 10, 1969 | Rainbow Trout | 2,100 | 4" | Montana fish & wildlife agency |
| May 27, 1969 | Rainbow Trout | 3,640 | 3" | Montana fish & wildlife agency |
| April 22, 1968 | Rainbow Trout | 3,599 | 3" | Montana fish & wildlife agency |
| September 14, 1966 | Rainbow Trout | 5,365 | 7" | Montana fish & wildlife agency |
Frequently asked
When was Olson Reservoir last stocked?
According to Montana fish & wildlife agency, Olson Reservoir was last stocked June 24, 1970 with Rainbow Trout.
What fish species are stocked in Olson Reservoir?
Olson Reservoir is stocked with Rainbow Trout.
How often is Olson Reservoir stocked?
Olson Reservoir has been stocked about 1 times a year — 6 recorded stockings between 1966 and 1970.
How many fish have been stocked in Olson Reservoir?
About 19,504 fish have been stocked in Olson Reservoir across 6 recorded events since 1966, per Montana fish & wildlife agency.
What size are the fish stocked in Olson Reservoir?
Fish stocked in Olson Reservoir average about 4.2 inches, based on the sizes the agency reported.