About Main Flowage
Main Flowage is a scenic Marathon County lake worth knowing about, a mid-sized lake at 108 acres and up to 8 feet deep. Access is limited, which keeps boat traffic low — a plus for solitude seekers.
Bottom composition: 5% sand, 0% gravel, 0% rock, 95% muck
Type: flowage · Hydrology: DRAINAGE
Lake Location
44.72780° N, 90.19030° W
WBIC 1422100 · Wisconsin DNRLocal's Guide
Fishing
Species-specific tips above. Wisconsin fishing license required for ages 16+. See current season regulations below.
View fishing regulations ↓Swimming
Sandy bottom sections make for good swimming. No lifeguard on duty — swim at your own risk.
Content coming soon
Nearby Dining
Looking for supper clubs and bait shops near Main Flowage? Local dining recommendations coming soon.
Content coming soon
Insider Tips
Local knowledge about Main Flowage — best times to visit, quiet spots, and what the regulars know. Contributed tips coming soon.
Content coming soon
Lake Conditions
Water Clarity
—
No data
Trophic Status
—
No data
Invasive Weeds
Not documented
Clean lake
Seasonal Notes
See below
Ice-out dates, peak fishing windows
Seasonal notes for Main Flowage coming soon — ice-out timing, peak fishing windows, and fall color dates.
Condition data sourced from Wisconsin DNR surveys. Real-time weed and clarity reports coming soon.
Frequently Asked Questions
Can you boat on Main Flowage?
Main Flowage does not currently have a public boat landing listed in the Wisconsin DNR database. Shore fishing or kayak/canoe access may still be available — check local access points.
How big is Main Flowage?
Main Flowage has 108 acres in surface area, a maximum depth of 8 feet.
What is the bottom of Main Flowage like?
The lake bottom is composed of 5% sand, 0% gravel, 0% rock, 95% muck. Sandy and gravel bottoms typically support good swimming and healthy fish habitat.
Are there invasive species in Main Flowage?
No invasive species are currently documented in Main Flowage by the Wisconsin DNR. Always clean, drain, and dry your boat before leaving to help protect this lake.
Where is Main Flowage located?
Main Flowage is located in Marathon County, Wisconsin. GPS coordinates: 44.7278° N, 90.1903° W.
Are there vacation rentals on Main Flowage?
Stay Northern is building the most complete rental directory for Marathon County lakes. Check our Main Flowage vacation rentals listing — if none are available yet, check back soon or browse nearby Marathon County lake rentals.
Fishing Regulations
Current season regulations for Main Flowage
| Species | Season | Min. Length | Daily Bag |
|---|---|---|---|
| Bullheads | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Catfish | Open All Year | No minimum length limit and the daily bag limit is 10. | — |
| Cisco And Whitefish | Open All Year | No minimum length limit and the daily bag limit is 10. | — |
| Lake Sturgeon | Closed | No fishing allowed. | — |
| Largemouth Bass And Smallmouth Bass | May 2, 2026 to March 7, 2027 | The minimum length limit is 14" and the daily bag limit is 5. | — |
| Muskellunge And Hybrids | May 2, 2026 to December 31, 2026 on open water | The minimum length limit is 40" and the daily bag limit is 1. | — |
| Northern Pike | May 2, 2026 to March 7, 2027 | No minimum length limit and the daily bag limit is 5. | — |
| Paddlefish | Closed | No fishing allowed. | — |
| Panfish | Open All Year | No minimum length limit and the daily bag limit is 25. | — |
| Rock, Yellow, And White Bass | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Rough Fish | Open All Year | No minimum length limit and the daily bag limit is unlimited. | — |
| Round Goby | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
| Ruffe | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
| Shovelnose Sturgeon | Closed | No fishing allowed. | — |
| Trout | See specific regulations | https://dnr.wisconsin.gov/topic/fishing/trout/ . | — |
| Walleye, Sauger, And Hybrids | May 2, 2026 to March 7, 2027 | The minimum length is 15", but walleye, sauger, and hybrids from 20" to 24" may not be kept, and only 1 fish over 24" is allowed. The daily bag limit is 3. | — |
| White Perch | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. | — |
Regulations sourced from Wisconsin DNR fisheries data. Always verify current regulations before fishing.
Lake Details
- WBIC
- 1422100
- County
- Marathon County
- Surface Area
- 108 acres
- Max Depth
- 8 ft
- Bottom
- 5% sand, 0% gravel, 0% rock, 95% muck
- Lake Type
- flowage
- Coordinates
- 44.7278, -90.1903
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Main Flowage? Let us know.
Lake data sourced from the Wisconsin DNR. Last updated 3/24/2026.