Montana stocking report
Rock Island Lake, Lower
Last reported stocking
The latest reported stocking at Rock Island Lake, Lower was on August 15, 1990: 400 Yellowstone Cutthroat Trout (1.7 in avg).
Record last checked: . This is not a stocking date.
Source: Montana Fish, Wildlife & Parks.
A schedule is a plan, not confirmation that fish were released. Stocking records do not guarantee fish are still available.
No current or upcoming schedule is in this archive. Check the official report before choosing a trip date.
Location map
Rock Island Lake, Lower location context
Pins appear only when the record includes coordinates; they are not verified access points. Shaded counties show area context only. Waters without coordinates stay in the list without a pin; confirm access and directions with the official agency source.
Before you go
Plan a trip to Rock Island Lake, Lower
Check the latest report
Confirm dates and any changes in the official stocking report. Historical schedules are kept below even after their planned dates pass.
Check access and fishing rules
Use Montana's official fishing information to find current guidance. Confirm the exact water, public access, closures, and applicable fishing rules before leaving.
Choose the right location
The map gives location context. A shaded county is area context, not directions to a fishing spot or evidence of public access.
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Stocking history
4 records from August 30, 1938 to August 15, 1990. Open a year to browse its records; scroll tables sideways for all columns. Scheduled means planned, even when the date has passed. Blank fields mean the source did not publish that detail.
1990 1 record
| Date / status | Species | Fish | Size | Hatchery | Source |
|---|---|---|---|---|---|
| August 15, 1990 reported | Yellowstone Cutthroat Trout | 400 | 1.7 in avg | Yellowstone River Trout Hatchery | Montana Fish, Wildlife & Parks |
1960 1 record
| Date / status | Species | Fish | Size | Hatchery | Source |
|---|---|---|---|---|---|
| September 19, 1960 reported | Rainbow Trout | 5,000 | 1 in avg | Washoe Park Trout Hatchery | Montana Fish, Wildlife & Parks |
1941 1 record
| Date / status | Species | Fish | Size | Hatchery | Source |
|---|---|---|---|---|---|
| September 4, 1941 reported | Rainbow Trout | 30,240 | Washoe Park Trout Hatchery | Montana Fish, Wildlife & Parks |
1938 1 record
| Date / status | Species | Fish | Size | Hatchery | Source |
|---|---|---|---|---|---|
| August 30, 1938 reported | Rainbow Trout | 18,000 | Washoe Park Trout Hatchery | Montana Fish, Wildlife & Parks |
Records retain the dates, quantities, and status supplied by the linked agencies. An event missing here does not mean the water was not stocked - some plants go unreported or are published elsewhere.
Grouped by county and sorted by latest record, not by driving distance. Confirm access for each water.
Data source: Montana Fish, Wildlife & Parks. A record for this water was last checked on . This check date is not a stocking date.
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