Mason Lake, Adams County Fishing
A 882-acre Wisconsin flowage in Adams County and Marquette County, down to 9 feet.
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Mason Lake, Adams County by the numbers
In Adams County and Marquette County, Mason Lake, Adams County spreads over 882 acres of open water. Expect water as deep as 9 feet, with a mean of 7 feet. Briggsville lies under a mile from the lake. It is a Northeast Region water for the WDNR. The DNR groups it as a complex warm dark lake.
The DNR fish list names largemouth bass, catfish, muskellunge, northern pike and panfish. There are 3 public boat landings on its shore. A 2017 satellite estimate puts clarity at 2.2 feet.
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Each species group in Mason Lake, Adams County carries a WDNR abundance word.
| Fish group | WDNR abundance |
|---|---|
| Largemouth Bass | Common |
| Catfish | Present |
| Musky | Present |
| Northern Pike | Present |
| Panfish | Present |
How the DNR describes the Mason Lake, Adams County fishery
“Complex warm dark lakes often support great action fisheries for black crappie, and have potential to produced quality walleye, northern pike, and/or muskellunge fisheries.”
WDNR Find a Lake fish list and abundance, WDNR lake classification and fisheries designation layers, checked October 2026.
Boat landings on Mason Lake, Adams County
- Mason Lake Access near Endeavor (WDNR 2500)2 lanes, 6 to 10 trailer stalls, boarding dock, Town of Douglas
- Mason Lake Access near Endeavor (WDNR 739)1 lane, 1 to 5 trailer stalls, boarding dock, Town of New Haven
- Mason Lake Access near Endeavor (WDNR 740)1 lane, 11 to 15 trailer stalls, boarding dock, restroom, Parks & Recreation Department
Boat landings close to Mason Lake, Adams County
- Big Slough Public AccessBig Slough, 3 miles southeast
- Jordan Lake AccessJordan Lake, 7 miles north
- Wisconsin River Access near Lake DeltonWisconsin River, 8 miles southwest
- Indian Trail Boat LaunchWisconsin River, 8 miles southwest
- Crooked Lake Access near OxfordCrooked Lake, 8 miles north
- Wisconsin River Access near Portage (WDNR 424)Wisconsin River, 8 miles south
WDNR Boat Access and Shore Fishing layers and Find a Lake landing table, checked October 2026.
What the water is like in Mason Lake, Adams County
The DNR bottom survey for Mason Lake, Adams County lists 60% sand, 5% gravel, 0% rock, 35% muck.
WDNR types Mason Lake, Adams County as a drainage lake (a stream flows in and out).
Invasives verified in Mason Lake, Adams County: banded mystery snail, brittle waternymph, curly-leaf pondweed, eurasian water-milfoil, japanese knotweed (fallopia japonica), phragmites (non-native) and yellow iris. Leave the landing with an empty bilge and live well.
WDNR Find a Lake page, WDNR Landsat lake clarity layer, checked October 2026.
Fishing regulations for Mason Lake, Adams County
Each row is the regulation the WDNR app prints for Mason Lake, Adams County.
| Species | Season | Rule |
|---|---|---|
| Walleye, sauger and hybrids | May 2, 2026 to March 7, 2027 | The minimum length limit is 15" and the daily bag limit is 3. |
| 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 | The minimum length limit is 32" and the daily bag limit is 1. |
| Largemouth and smallmouth bass | May 2, 2026 to March 7, 2027 | No minimum length, but largemouth bass and smallmouth bass from 14" to 18" may not be kept, and only 1 fish over 18 is allowed. The daily bag limit is 5. |
| Panfish | Open All Year | No minimum length limit and the daily bag limit is 25. |
| Catfish | Open All Year | See specific species regulations in this group. |
| Channel catfish | Open All Year | No minimum length limit and the daily bag limit is 25, 25 in total, but only 24 if one flathead catfish is included. |
| Flathead catfish | May 2, 2026 to September 30, 2026 | The minimum length is 30, but flathead catfish from 36" to 42" may not be kept.The daily bag limit is 1. |
| Lake sturgeon | Closed | No fishing allowed. |
| Shovelnose sturgeon | Closed | No fishing allowed. |
| Cisco and whitefish | Open All Year | No minimum length limit and the daily bag limit is 10. |
| Rock, yellow and white bass | Open All Year | No minimum length limit and the daily bag limit is unlimited. |
| Bullheads | 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. |
Every species on Mason Lake, Adams County also falls under this note: Catch and release fishing for largemouth and smallmouth bass is open year round unless otherwise noted. Motor Trolling is allowed with up to 3 hooks, baits, or lures, per angler.
From the Adams County section of the guide: Motor trolling is permitted countywide (three hooks, baits or lures per person).
For pike Mason Lake, Adams County is south of Hwy 10, and the Southern Bass Zone sets its bass dates.
WDNR Lake Regulation search and the 2026-2027 Guide to Wisconsin Hook and Line Fishing Regulations, checked October 2026.
Recent stockings at Mason Lake, Adams County
Stocking records for Mason Lake, Adams County: 1 entries, 730 fish, years 2025 to 2025.
| Year | Species | Size | Avg length | Number |
|---|---|---|---|---|
| 2025 | Northern pike | large fingerling | 14 in | 730 |
WDNR Fish Stocking Summary, stocking years 2023 to 2025. Wisconsin stocking.
Lakes near Mason Lake, Adams County compared
| Lake | Distance | Acres | Max depth ft | Landings | WDNR class |
|---|---|---|---|---|---|
| Mason Lake, Adams County | 882 | 9 | 3 | complex warm dark | |
| Amey Pond | under a mile southwest | 59 | 7 | 0 | simple warm dark |
| Weeting Lake | 2 miles southwest | 34 | 4 | 0 | simple harsh has fishery |
| Corning Lake | 3 miles southwest | 29 | 4 | 0 | simple warm dark |
| Jordan Lake, Adams County | 6 miles north | 233 | 92 | 1 | complex two story |
| Crooked Lake, Adams County | 8 miles north | 48 | 56 | 1 | simple warm clear |
WDNR Find a Lake, lake classification and boat access layers.
Around the area of Mason Lake, Adams County
Lakes next door to Mason Lake, Adams County
- Amey Pondunder a mile southwest
- Weeting Lake2 miles southwest
- Corning Lake3 miles southwest
- Jordan Lake, Adams County6 miles north
- Crooked Lake, Adams County8 miles north
Minnows and tackle close to Mason Lake, Adams County
- Holiday Shores Marinamarina, Wisconsin Dells, 8 miles
- The Minnow Bucket, 321 S Franklin Avebait and tackle shop, Oxford, 9 miles
- Walmart Portagefarm and general store with fishing gear, Portage, 9 miles
- Runnings #110farm and general store with fishing gear, Portage, 9 miles
- M And M Tackle It Bait Shopbait and tackle shop, Portage, 9 miles
- Schleefs Bait Shopbait and tackle shop, Wisconsin Dells, 9 miles
Towns within reach of Mason Lake, Adams County
- Briggsvilleunder a mile
- Endeavor8 miles
- Wisconsin Dells8 miles
Mason Lake, Adams County by county
- Adams Countyseat: Friendship
- Marquette Countyseat: Montello
Piscifun spinning and casting reels for Mason Lake, Adams County
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Know the fish of Mason Lake, Adams County
Photo: USFWS Mountain Prairie, Public domain
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Photo: Oregon Department of Fish & Wildlife, CC BY-SA 2.0
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Photo: USFWS Mountain Prairie, Public domain
Photo: USFWS Mountain-Prairie, Public domain
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Mason Lake, Adams County: what Wisconsin anglers want to know
Which Wisconsin county is Mason Lake, Adams County in?
Look in Adams County and Marquette County, WDNR Northeast Region, under a mile from Briggsville.
How many acres does the WDNR give Mason Lake, Adams County?
882 acres of water and 9 feet at the deepest.
Can I back a trailer into Mason Lake, Adams County at a public landing?
3 mapped landings, led by Mason Lake Access near Endeavor (WDNR 2500).
Which fish does the WDNR list for Mason Lake, Adams County?
On file: largemouth bass (common), catfish (present), muskellunge (present), northern pike (present) and panfish (present).
What size limits apply on Mason Lake, Adams County?
Walleye, sauger and hybrids: The minimum length limit is 15" and the daily bag limit is 3.
What does a nonresident pay to fish Mason Lake, Adams County?
Anglers 16 and older need a Wisconsin fishing license: $20 a year for residents and $55 for nonresidents, with a $5 first-time buyer rate for residents.
How clear does the water in Mason Lake, Adams County run?
Satellite clarity about 2.2 feet (2017). Bottom: 60% sand, 5% gravel, 0% rock, 35% muck. WDNR class: complex warm dark. Type: drainage.
Which bait counter sits closest to Mason Lake, Adams County?
Holiday Shores Marina is about 8 miles from the lake.
When did WDNR crews last stock Mason Lake, Adams County?
WDNR stocked 730 northern pike in 2025.
Hitch up the boat and haul it to Mason Lake, Adams County
The license page has every Wisconsin fee and season.