Where to Fish Rock Island Lake


Lake gets a fair amount of use due to relatively easy access. YCT are stocked every 3 years. Fishing is good for nice sized YCT and EB. In 2018 MTFWP netted in the NE arm.

Size 137.0 acres
Elevation 8177.04 ft.
Directions 3.25 miles from Kersey Lake Trailhead. Past Kersey take right Trail #565 ~.75 miles to rock island.
Status of the Fishery
Township/Range/Section 09S 15E 25
Latitude/Longitude 45.01641 -109.80979
FWP Region Region 5 
County Park
Fishing District Central
Type: MTNLAKE
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Waterbody Section Field Form Type Date Purpose Species
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For Comparative analysis all Length Units are millimeters : all Weights are grams

Species Count Avg StdDev Min Max AvgWgt StdDevWgt MinWeight S/L Sects Surveys Waterbody
To see this data, first select one or more rows from the Collection Info tab.
For Comparative analysis all Length Units are millimeters : all Weights are grams

Waterbody Section Species Count AveLength StdDevLength MinLength MaxLength AveWeight StdDevWeight MinWeight MaxWeight
To see this data, first select one or more rows from the Collection Info tab.
For Comparative analysis all Length Units are millimeters : all Weights are grams

Waterbody Year Section Species Count AveLength StdDevLength MinLength MaxLength AveWeight StdDevWeight MinWeight MaxWeight
To see this data, first select one or more rows from the Collection Info tab.
This is a preview, all fields will be visible by selecting a download option. For Comparative analysis all Length Units are millimeters : all Weights are grams.

Year Species Abbrv Length Weight M/C Count Sex Mort Hook Scar Disease Scales Otolith Fin Clip Tag Comment Genetics Age Stomach Intercept Slope Gear Equipment Trip Date Pass/Run Water Section Lat/Down Lon/Down Lat/Up Lon/Up
Year Angler Days Std. Error
2013 275 210
2009 1683 1032

View the latest Montana Fishing Regulations.

There is no fish consumption advisory for this waterbody.