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Photo: Corey Coyle, CC BY 3.0 
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Wisconsin lakes
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Mud Lake near Rio, Columbia County Fishing
A 817-acre Wisconsin lake in Columbia County.
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Fishing times todaySolunar periods, sunrise and moonrise for the county around Mud Lake near Rio, Columbia County, today and the next 7 days.Best fishing times today
Columbia County
Getting acquainted with Mud Lake near Rio, Columbia County
The WDNR lists Mud Lake near Rio, Columbia County at 817 acres, a lake in Columbia County. In a straight line, about 4 miles separates the lake from Rio. Fisheries work here comes out of the South Central Region.
The WDNR access layer maps 2 public boat landings. WDNR satellite clarity is 4.8 feet for 2017.
817acres
2mapped landings
4.8 ftsatellite clarity
Landings
Landings around Mud Lake near Rio, Columbia County
- South Shore Access1 lane, 6 to 10 trailer stalls, public
- Traut Road Canoe Carry-in Boat Landing1 lane, public
Public landings near Mud Lake near Rio, Columbia County
- Wyona Park Boat RampWyona Lake, 6 miles north
- Grassy Lake East AccessGrassy Lake, 7 miles east
- Lake Columbia Public AccessLake Columbia, 7 miles northwest
- Crystal Lake Access near PardeevilleCrystal Lake, 9 miles north
- Spring Lake Boat Landing near PardeevilleSpring Lake, 9 miles north
- Lake George Park Boat RampLake George, 9 miles northwest
WDNR Boat Access and Shore Fishing layers and Find a Lake landing table, checked October 2026.
Water
Depth and bottom of Mud Lake near Rio, Columbia County
4.8 ftsatellite clarity (2017)
2public parcels near shore
WDNR Find a Lake page, WDNR Landsat lake clarity layer, checked October 2026.
Regulations
The rule table for Mud Lake near Rio, Columbia County
WDNR lists these Mud Lake near Rio, Columbia County seasons and bag rules species by species.
| 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 26" and the daily bag limit is 2. |
| Largemouth and smallmouth bass | May 2, 2026 to March 7, 2027 | The minimum length limit is 14" and 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 | No minimum length limit and the daily bag limit is 10. |
| 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. |
| Paddlefish | Closed | No fishing allowed. |
| White perch | Open All Year | The daily bag limit is 0, one may be killed and possessed for transport to a WDNR Office. |
The WDNR record for Mud Lake near Rio, Columbia County adds: 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.
County text for Columbia: Motor trolling is permitted countywide (three hooks, baits or lures per person).
Mud Lake near Rio, Columbia County is south of US Highway 10 for pike, and in the Southern Bass Zone for bass.
WDNR Lake Regulation search and the 2026-2027 Guide to Wisconsin Hook and Line Fishing Regulations, checked October 2026.
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Mud Lake near Rio, Columbia County beside its neighbors
| Lake | Distance | Acres | Max depth ft | Landings | WDNR class |
|---|---|---|---|---|---|
| Mud Lake near Rio, Columbia County | 817 | 2 | |||
| Curtis Lake, Columbia County | 6 miles northwest | 42 | 7 | 0 | simple riverine |
| Wyona Lake (Wyocena Millpond) | 6 miles north | 96 | 12 | 1 | simple riverine |
| Grassy Lake, Columbia County | 6 miles east | 250 | 1 | ||
| Goose Lake, Columbia County | 7 miles southwest | 55 | 3 | 0 | simple harsh no fishery |
| Lake Columbia | 8 miles northwest | 378 | 8 | 1 | simple warm dark |
WDNR Find a Lake, lake classification and boat access layers.
Nearby
In reach of Mud Lake near Rio, Columbia County
Other Wisconsin lakes close to Mud Lake near Rio, Columbia County
- Curtis Lake, Columbia County6 miles northwest
- Wyona Lake (Wyocena Millpond)6 miles north
- Grassy Lake, Columbia County6 miles east
- Goose Lake, Columbia County7 miles southwest
- Lake Columbia8 miles northwest
Tackle shops a short drive from Mud Lake near Rio, Columbia County
- Hwy Bait & Tacklebait and tackle shop, Pardeeville, 11 miles
- Dw Mens Wear & Sportssporting goods store, Portage, 12 miles
- M And M Tackle It Bait Shopbait and tackle shop, Portage, 14 miles
- Runnings #110farm and general store with fishing gear, Portage, 14 miles
- Walmart Portagefarm and general store with fishing gear, Portage, 14 miles
- Bridge Bait & Tackle Shopbait and tackle shop, Lodi, 15 miles
Nearby Wisconsin towns for Mud Lake near Rio, Columbia County
- Rio4 miles
- Wyocena6 miles
- Poynette6 miles
County pages for Mud Lake near Rio, Columbia County
- Columbia Countyseat: Portage
Piscifun
Gear from Piscifun for Mud Lake near Rio, Columbia County
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Photographs
Shoreline scenes a drive from Mud Lake near Rio, Columbia County
Photo: Corey Coyle, CC BY 3.0
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Photo: Awkwafaba, CC BY-SA 3.0
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Photo: Michael Barera, CC BY-SA 4.0
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Photo: Joshua Mayer, CC BY-SA 2.0
Answers
Quick facts people look up on Mud Lake near Rio, Columbia County
How far is Mud Lake near Rio, Columbia County from the nearest Wisconsin town?
In Columbia County, WDNR South Central Region, about 4 miles from Rio.
How big is Mud Lake near Rio, Columbia County by the WDNR count?
About 817 acres.
Which landing should I use to launch on Mud Lake near Rio, Columbia County?
Try South Shore Access, one of 2 mapped landings.
Does the WDNR list walleye in Mud Lake near Rio, Columbia County?
No WDNR fish list exists for it.
What can I keep from Mud Lake near Rio, Columbia County?
Walleye, sauger and hybrids, per WDNR: The minimum length limit is 15" and the daily bag limit is 3.
Is a stamp needed on Mud Lake near Rio, Columbia 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.
What lake class is Mud Lake near Rio, Columbia County?
Satellite clarity about 4.8 feet (2017).
Where can I buy bait on the way to Mud Lake near Rio, Columbia County?
Closest on our list: Hwy Bait & Tackle, 11 miles.
Put Mud Lake near Rio, Columbia County on this year's Wisconsin list
Buy a Go Wild license before the drive.