Long (Main Bay)
Itasca County, Minnesota, near Bigfork. DNR lake ID 31026601.
Long (Main Bay) is a 346-acre lake in Itasca County, Minnesota, near Bigfork. Its deepest point reaches 34 ft, and about 51% of the lake is shallower than 15 feet. Summer water clarity averages 7.5 feet in Minnesota Pollution Control Agency monitoring, which places it in the mesotrophic nutrient class. It is not on the DNR infested waters list as of September 2026. DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch.
Buying or selling on Long (Main Bay)? Ask us what lakeshore here actually sells for, which stretches of shoreline buyers compete for, and what’s coming up before it’s listed.
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Quick facts
| DNR lake ID | 31026601 |
|---|---|
| County | Itasca County, near Bigfork |
| Surface area | 346 acres |
| Maximum depth | 34 ft |
| Share under 15 ft | 51% |
| Water clarity (summer) | 7.5 ft through 2025 |
| Phosphorus (summer) | 17.0 µg/L |
| Algae, chlorophyll-a (summer) | 3.6 µg/L |
| Nutrient class | Mesotrophic |
| Invasive species | Not on DNR infested waters list (Sept 2026) |
| Public water accesses | 1 |
Water quality
Summer averages from Minnesota Pollution Control Agency monitoring through 2025: clarity 7.5 ft, phosphorus 17.0 µg/L, algae (chlorophyll-a) 3.6 µg/L. Using the Carlson trophic state index, Long (Main Bay) rates as mesotrophic.
Fishing on Long (Main Bay)
The most recent DNR standard fish survey was in 2017 (9 years ago). Catch per net is compared with the DNR’s typical range for lakes of the same type.
| Species | Net | Catch per net | Typical range |
|---|---|---|---|
| Walleye | gill | 0.11 | 1.3 to 5.5 |
| Northern pike | gill | 5.67 | 3.1 to 8.5 |
| Northern pike | trap | 0.25 | n/a |
| Yellow perch | gill | 4.33 | 2.5 to 24.2 |
| Black crappie | gill | 5.22 | 0.5 to 2.7 |
| Black crappie | trap | 3.12 | 0.7 to 3.2 |
| Bluegill | gill | 2.11 | n/a |
| Bluegill | trap | 18.5 | 5.6 to 42.3 |
| Largemouth bass | gill | 1.0 | 0.3 to 1.2 |
| Largemouth bass | trap | 0.25 | 0.3 to 1.1 |
| Pumpkinseed | trap | 1.0 | 1.7 to 8.2 |
Walleye catch was below the typical range for similar lakes in that survey.
Largest fish measured in recent DNR samples: Largemouth bass 18.0 in (2017), Northern pike 34.0 in (2017), Walleye 18.0 in (2017).
Game and panfish documented since 2005: Walleye, Northern pike, Largemouth bass, Black crappie, Bluegill, Yellow perch, Pumpkinseed, Rock bass, White sucker, Yellow bullhead, Brown bullhead.
Fishing regulations
No lake-specific regulation found in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Regulations change. Confirm with the DNR before fishing.
Invasive species
Not on the Minnesota DNR infested waters list as of September 2026. That means no confirmed listing, not a guarantee the lake is free of invasive species.
Public boat access
No public water access on DNR record.
Nearby lakes
- Long Lake 0.0 mi, Itasca County
- Gunny Sack Lake 1.0 mi, Itasca County
- Buckman Lake 1.5 mi, Itasca County
- Bluebill Lake 1.5 mi, Itasca County
- Round Lake 1.5 mi, Itasca County
- Ross Lake 1.9 mi, Itasca County
- Marble Lake 1.9 mi, Itasca County
- White Swan Lake 2.0 mi, Itasca County
Questions about Long (Main Bay)
How deep is Long (Main Bay)?
Long (Main Bay) reaches a maximum depth of 34 ft according to Minnesota DNR records. About 51% of the lake is shallower than 15 feet.
How big is Long (Main Bay)?
Long (Main Bay) covers about 346 acres in Itasca County, Minnesota.
How clear is Long (Main Bay)?
Summer water clarity on Long (Main Bay) averages 7.5 feet (Secchi depth) in MPCA monitoring through 2025. Its trophic state is mesotrophic.
Does Long (Main Bay) have zebra mussels or other invasive species?
Long (Main Bay) is not on the Minnesota DNR infested waters list as of September 2026. That means there is no confirmed listing; it is not a guarantee the lake is free of invasive species.
What fish are in Long (Main Bay)?
Minnesota DNR surveys document walleye, northern pike, largemouth bass, black crappie, bluegill, yellow perch, pumpkinseed, rock bass, white sucker, yellow bullhead in Long (Main Bay). The most recent standard survey was in 2017.
How is the walleye population on Long (Main Bay)?
In Minnesota DNR net surveys from 1997 to 2017, walleye numbers on Long (Main Bay) ran mostly below the typical range for similar lakes. Nets measure how many fish a lake holds, not where they’re biting, so local guides are the best source for current fishing.
Are there lake homes for sale on Long (Main Bay)?
Homes on Long (Main Bay) come up for sale throughout the year, and some sell before they’re ever publicly advertised. Tell us what you’re looking for and our agents will run a custom search and send you matching homes on Long (Main Bay) and nearby lakes, including off-market opportunities when available.
What is it like to live on Long (Main Bay)?
A mid-size lake with room for boating and fishing, about 51% shallow shoreline under 15 feet, and summer clarity around 7.5 feet. Conditions vary by property, so walk the frontage and ask us what similar homes have sold for.
Are there special fishing regulations on Long (Main Bay)?
No lake-specific regulation was found for Long (Main Bay) in Minnesota Rules or the DNR sunfish list. Statewide and zone regulations apply.
Ask us about Long (Main Bay)
Whether you’re buying, selling, or just curious, our team works Itasca County lakes every day. Send us a note or call (218) 656-6469.
Sources: Minnesota DNR LakeFinder records, DNR fish surveys (latest 2017), DNR infested waters list (Sept 2026), Minnesota Rules 6264.0400 (April 2026), MPCA monitoring via the Water Quality Portal, DNR water access records (2023), LAGOS-US. Lakewide information from public data; it does not describe any specific property. Verify shoreline, bottom type, and depth at any frontage.