---
type: lake
name: "Boulder Lake"
county: "St. Louis"
nearest_town: "Duluth"
lake_type: "lake"
acres: 3260
max_depth_ft: 18
latitude: 47.06286
longitude: -92.17346
lake_score: 55
dnr_lake_id: "69037300"
url: https://www.minnelakes.org/lakes/st-louis-county/boulder-lake
---

# Boulder Lake

Lake in St. Louis County, Minnesota, near Duluth

- **Surface Area**: 3,260 acres
- **Max Depth**: 18 ft
- **Average Depth**: 8 ft
- **Shoreline**: 35.1 miles
- **Water Clarity**: 5.5 ft
- **Lake Type**: lake
- **Public Access**: Public access on record
- **Lake Score**: 55/100 (composite of public data, not a visitor rating)

## About

Boulder Lake is a 3,260-acre lake near Duluth in St. Louis County, Minnesota. It reaches 18 feet at its deepest point, with an average depth of about 8 feet, and has roughly 35.1 miles of shoreline. DNR surveys put average water clarity at about 5.5 feet.

Minnesota DNR fisheries surveys list 9 fish species here, including walleye, northern pike, black crappie, pumpkinseed, yellow perch, and burbot. The most recent fisheries survey on file dates to 2025.

The DNR lists public water access for the lake; confirm the launch type before towing a trailer in. Buzz Ryan Campsites is mapped close to the shoreline for overnight stays.

## Access

- **Public access**: Public access on record
- **Managed by**: Not recorded
- **Launch fee**: Free at DNR public water accesses

## Fishing

- **Species on DNR survey**: 9
- **Stocked**: No
- **Last DNR survey**: 2025
- **Special regulations**: No
- **Ice fishing**: Yes

## Activities

Fishing, Ice Fishing, Paddling, Camping

## Amenities

Campground

### Campgrounds

- Buzz Ryan Campsites

## Fish Species

Walleye, Northern Pike, Black Crappie, Pumpkinseed, Yellow Perch, Burbot, Rock Bass, Black Bullhead, White Sucker

## Nearby Lakes

- [Island Lake Reservoir](https://www.minnelakes.org/lakes/st-louis-county/island-lake-reservoir) - 3.4 miles, 8,001 acres
- [Morgan Lake](https://www.minnelakes.org/lakes/st-louis-county/morgan-lake) - 4.9 miles, 104 acres
- [Schultz Lake](https://www.minnelakes.org/lakes/st-louis-county/schultz-lake) - 5.2 miles, 210 acres
- [Flowage](https://www.minnelakes.org/lakes/st-louis-county/flowage) - 5.3 miles, 112 acres
- [Thompson Lake](https://www.minnelakes.org/lakes/st-louis-county/thompson-lake) - 5.4 miles, 207 acres
- [Alden Lake](https://www.minnelakes.org/lakes/st-louis-county/alden-lake) - 6.8 miles, 190 acres

## Links

- [Directions](https://www.google.com/maps/dir/?api=1&destination=47.06286,-92.17346)
- [Minnesota DNR LakeFinder](https://www.dnr.state.mn.us/lakefind/lake.html?id=69037300)
- [All lakes in St. Louis County](https://www.minnelakes.org/lakes/st-louis-county)

---
*Source: [MinneLakes.org](https://www.minnelakes.org/lakes/st-louis-county/boulder-lake)*