Rainbow Trout Stocked · 15 plants · last May 15, 2026 Best: dawn, dusk Kolar Reservoir 1 fishing
Kolar Reservoir 1 fishing is stocked with Brook Trout and Rainbow Trout on a reservoir. Also recorded: White sucker and Fathead minnow. It is stocked about 1.2 times a year since 2011, most often in May and June. Species guides list dawn, day, and dusk for Brook Trout and dawn and dusk for Rainbow Trout.
- Last stocked
- May 15, 2026
- · Rainbow Trout
- Plants on record
- 19
- Since 2011
- Species stocked
- 2 (+2 also recorded)
- Average size
- 6.7 in
- Elevation
- 4,103 ft
Fish at Kolar Reservoir 1
Around the dates Kolar Reservoir 1 is stocked, Open-Meteo's 2016-2025 archive puts mean air temperature at 51.8°F in May, 61.1°F in June, 70.5°F in July, 40.9°F in April. That is air temperature at these coordinates, not water temperature. Open-Meteo
Rainbow Trout Stocked · 15 plants · last May 15, 2026 Best: dawn, dusk 
Brook Trout Stocked · 4 plants · last July 2, 2014 Best: dawn, day, dusk White sucker Confirmed present
Fathead minnow Confirmed present How Kolar Reservoir 1 is stocked
No plants recorded in 2016.
Fish stocked in 2011
2,500
Fish stocked in 2012
2,500
Fish stocked in 2013
2,560
Fish stocked in 2014
2,538
Fish stocked in 2015
1,747
Fish stocked in 2017
1,500
Fish stocked in 2018
1,000
Fish stocked in 2019
1,500
Fish stocked in 2020
1,500
Fish stocked in 2021
1,500
Fish stocked in 2022
1,500
Fish stocked in 2023
1,500
Fish stocked in 2024
1,500
Fish stocked in 2025
1,500
Fish stocked in 2026
1,400
Stocking history
| Date | Species | Quantity | Avg. length | Source |
|---|---|---|---|---|
| May 15, 2026 | Rainbow Trout | 1,400 | 7.59 in | report |
| May 27, 2025 | Rainbow Trout | 1,500 | 7.31 in | report |
| May 15, 2024 | Rainbow Trout | 1,500 | 7.06 in | report |
| May 15, 2023 | Rainbow Trout | 1,500 | 7.03 in | report |
| May 19, 2022 | Rainbow Trout | 1,500 | 7.54 in | report |
| May 19, 2021 | Rainbow Trout | 1,500 | 7.4 in | report |
| June 3, 2020 | Rainbow Trout | 1,500 | 7.51 in | report |
| June 4, 2019 | Rainbow Trout | 1,500 | 7.1 in | report |
| June 5, 2018 | Rainbow Trout | 1,000 | 6.72 in | report |
| June 1, 2017 | Rainbow Trout | 1,500 | 8.5 in | report |
| May 21, 2015 | Rainbow Trout | 1,747 | 7.06 in | report |
| July 2, 2014 | Brook Trout | 1,034 | 4.26 in | report |
| May 22, 2014 | Rainbow Trout | 1,504 | 7.88 in | report |
| July 23, 2013 | Brook Trout | 1,057 | 4.74 in | report |
| June 11, 2013 | Rainbow Trout | 1,503 | 7.99 in | report |
| June 18, 2012 | Rainbow Trout | 1,500 | 7.8 in | report |
| June 18, 2012 | Brook Trout | 1,000 | 4.1 in | report |
| June 2, 2011 | Rainbow Trout | 1,500 | 7.7 in | report |
| April 29, 2011 | Brook Trout | 1,000 | 2.7 in | report |
Access and facts
- Water type
- reservoir
- Nearest town
- Geyser
Walk-in reservoir on McCarthy Creek on private ranch land open to the public under an FWP agreement. From Geyser go north on 3rd St. E for 1 mile, turn right on county road 551, park on the road and walk in; the reservoir is south of the road. Cattle are present.
Drafted by AI from the cited sources and checked before publishing.
Advisories, closures, regulations and water conditions change. Check the Montana Fish, Wildlife & Parks before you go.
Nearest lakes
Common questions
What fish are at Kolar Reservoir 1?
Fishing Kolar Reservoir 1 usually means Rainbow Trout: Rainbow Trout accounts for 15 of 19 plants on record, ahead of Brook Trout. Rainbow Trout was last stocked May 15, 2026, averaging 7.5 in. Brook Trout was last stocked July 2, 2014, averaging 4 in. White sucker and Fathead minnow are recorded here outside the stocking reports.
When is Kolar Reservoir 1 stocked?
Last stocked May 15, 2026. It is stocked about 1.2 times a year since 2011, most often in May and June. No plants recorded in 2016.
How big are the fish stocked at Kolar Reservoir 1?
Stocked fish average 6.7 in. Rainbow Trout average 7.5 in. Brook Trout average 4 in.
How do you get on Kolar Reservoir 1?
The nearest town is Geyser. Walk-in reservoir on McCarthy Creek on private ranch land open to the public under an FWP agreement. From Geyser go north on 3rd St. E for 1 mile, turn right on county road 551, park on the road and walk in; the reservoir is south of the road. Cattle are present.
Which lakes near Kolar Reservoir 1 were stocked more recently?
Ackley Lake (33.7 mi) and Rainbow Dam Reservoir (39.1 mi) were stocked more recently. Ackley Lake is also stocked with Rainbow Trout and Rainbow Dam Reservoir is also stocked with Rainbow Trout.