---
type: lake
name: "Mahnomen, Alstead & Arco Lake"
county: "Crow Wing"
nearest_town: "Armour Number Two Mine"
lake_type: "lake"
acres: 272
max_depth_ft: 525
latitude: 46.48746
longitude: -93.99487
lake_score: 65
dnr_lake_id: "18044000"
url: https://www.minnelakes.org/lakes/crow-wing-county/mahnomen-alstead-and-arco-lake
---

# Mahnomen, Alstead & Arco Lake

Lake in Crow Wing County, Minnesota, near Armour Number Two Mine

- **Surface Area**: 272 acres
- **Max Depth**: 525 ft
- **Shoreline**: 8.1 miles
- **Water Clarity**: 32.3 ft
- **Lake Type**: lake
- **Public Access**: 1 public boat launch (concrete)
- **Lake Score**: 65/100 (composite of public data, not a visitor rating)

## About

Mahnomen, Alstead & Arco Lake is a 272-acre lake near Armour Number Two Mine in Crow Wing County, Minnesota. It reaches 525 feet at its deepest point, and has roughly 8.1 miles of shoreline. DNR surveys put average water clarity at about 32.3 feet, which is exceptionally clear for Minnesota.

Minnesota DNR fisheries surveys list 16 fish species here, including walleye, northern pike, largemouth bass, smallmouth bass, black crappie, and bluegill. Special fishing regulations apply to lake trout, and they override the statewide limits. The most recent fisheries survey on file dates to 2022.

There is one public boat launch (concrete surface) managed by the Minnesota DNR. The lake is listed as infested with zebra mussel — clean, drain and dry your boat and gear before leaving.

## Access

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

## Fishing

- **Species on DNR survey**: 16
- **Stocked**: No
- **Last DNR survey**: 2022
- **Special regulations**: Yes
- **Ice fishing**: Yes

### Special Regulations

- **Lake Trout**: All less than 20" must be immediately released, possession limit one.

## Activities

Fishing, Ice Fishing, Boating, Paddling

## Amenities

Boat Ramp

## Fish Species

Walleye, Northern Pike, Largemouth Bass, Smallmouth Bass, Black Crappie, Bluegill, Pumpkinseed, Yellow Perch, Rainbow Trout, Burbot, Tullibee (Cisco), Rock Bass, Black Bullhead, Hybrid Sunfish, White Sucker, Yellow Bullhead

## Invasive Species

zebra mussel. Clean, drain and dry boats and gear before leaving.

## Nearby Lakes

- [Pennington Mine](https://www.minnelakes.org/lakes/crow-wing-county/pennington-mine) - 0.6 miles, 62 acres
- [Mahnomen Lake](https://www.minnelakes.org/lakes/crow-wing-county/mahnomen-lake) - 0.8 miles, 238 acres
- [Huntington Mine](https://www.minnelakes.org/lakes/crow-wing-county/huntington-mine) - 0.8 miles, 106 acres
- [Black Hoof Lake](https://www.minnelakes.org/lakes/crow-wing-county/black-hoof-lake) - 1.3 miles, 201 acres
- [Portsmouth Mine](https://www.minnelakes.org/lakes/crow-wing-county/portsmouth-mine) - 1.4 miles, 149 acres
- [Little Black Hoof Lake](https://www.minnelakes.org/lakes/crow-wing-county/little-black-hoof-lake) - 2.2 miles, 72 acres

## Links

- [Directions](https://www.google.com/maps/dir/?api=1&destination=46.48746,-93.99487)
- [Minnesota DNR LakeFinder](https://www.dnr.state.mn.us/lakefind/lake.html?id=18044000)
- [All lakes in Crow Wing County](https://www.minnelakes.org/lakes/crow-wing-county)

---
*Source: [MinneLakes.org](https://www.minnelakes.org/lakes/crow-wing-county/mahnomen-alstead-and-arco-lake)*