---
type: lake
name: "Three Island Lake"
county: "Cass"
nearest_town: "Longville"
lake_type: "lake"
acres: 288
max_depth_ft: 13
latitude: 47.03863
longitude: -94.27259
lake_score: 55
dnr_lake_id: "11017700"
url: https://www.minnelakes.org/lakes/cass-county/three-island-lake
---

# Three Island Lake

Lake in Cass County, Minnesota, near Longville

- **Surface Area**: 288 acres
- **Max Depth**: 13 ft
- **Shoreline**: 7.5 miles
- **Water Clarity**: 10.3 ft
- **Lake Type**: lake
- **Public Access**: 1 public boat launch (concrete)
- **Lake Score**: 55/100 (composite of public data, not a visitor rating)

## About

Three Island Lake is a 288-acre lake near Longville in Cass County, Minnesota. It reaches 13 feet at its deepest point, and has roughly 7.5 miles of shoreline. DNR surveys put average water clarity at about 10.3 feet, clearer than most lakes in the state.

Minnesota DNR fisheries surveys list 8 fish species here, including northern pike, largemouth bass, black crappie, bluegill, pumpkinseed, and yellow perch. The most recent fisheries survey on file dates to 2022.

There is one public boat launch (concrete surface) managed by the US Forest Service.

## Access

- **Public access**: 1 public boat launch (concrete)
- **Managed by**: US Forest Service
- **Launch fee**: Free at DNR public water accesses

## Fishing

- **Species on DNR survey**: 8
- **Stocked**: No
- **Last DNR survey**: 2022
- **Special regulations**: No
- **Ice fishing**: Yes

## Activities

Fishing, Ice Fishing, Boating, Paddling

## Amenities

Boat Ramp

## Fish Species

Northern Pike, Largemouth Bass, Black Crappie, Bluegill, Pumpkinseed, Yellow Perch, Hybrid Sunfish, White Sucker

## Nearby Lakes

- [Silver Lake](https://www.minnelakes.org/lakes/cass-county/silver-lake) - 2.3 miles, 121 acres
- [Cedar Lake](https://www.minnelakes.org/lakes/cass-county/cedar-lake) - 2.4 miles, 135 acres
- [Horseshoe Lake](https://www.minnelakes.org/lakes/cass-county/horseshoe-lake-whipolt) - 2.9 miles, 127 acres
- [Town Line Lake](https://www.minnelakes.org/lakes/cass-county/town-line-lake) - 3.8 miles, 698 acres
- [Kego Lake](https://www.minnelakes.org/lakes/cass-county/kego-lake) - 3.9 miles, 121 acres
- [Girl Lake](https://www.minnelakes.org/lakes/cass-county/girl-lake) - 4.3 miles, 428 acres

## Links

- [Directions](https://www.google.com/maps/dir/?api=1&destination=47.03863,-94.27259)
- [Minnesota DNR LakeFinder](https://www.dnr.state.mn.us/lakefind/lake.html?id=11017700)
- [All lakes in Cass County](https://www.minnelakes.org/lakes/cass-county)

---
*Source: [MinneLakes.org](https://www.minnelakes.org/lakes/cass-county/three-island-lake)*