Townline Reservoir*
Marathon, Portage County, Wisconsin
About Townline Reservoir*
Townline Reservoir* is a scenic Marathon, Portage County lake worth knowing about, a mid-sized lake at 395 acres and up to 10 feet deep. Access is limited, which keeps boat traffic low — a plus for solitude seekers. Anglers primarily target Northern Pike.
Bottom composition: 60% sand, 0% gravel, 0% rock, 40% muck
Type: flowage · Hydrology: DRAINED
Lake Location
44.69170° N, 89.81610° W
WBIC 1414800 · Wisconsin DNRFish Species
Full table →Fishing Tips
- ·Northern pike are ambush predators — target weed edges, fallen timber, and points with large spoons or swimbaits.
- ·Spring pike fishing (ice-out through June) can be outstanding as they move into shallow, warming bays to spawn.
Local's Guide
Fishing
Species-specific tips above. Wisconsin fishing license required for ages 16+. See current season regulations below.
View fishing regulations ↓Swimming
Townline Reservoir* has limited visibility and a gravel and sand bottom, making it better suited for boating and fishing than swimming. The 395-acre lake offers a quieter, more intimate swimming experience.
Nearby Dining
Local dining recommendations for Townline Reservoir* are coming soon. Know a great spot near Townline Reservoir*? Share it at staynorthern.com/contact. Looking for restaurants near Marathon, Portage County lakes? Visit staynorthern.com/eats for our full northwoods dining guide.
Insider Tips
Townline Reservoir* is one of Marathon, Portage County's lesser-known gems — the kind of place locals return to year after year. Early mornings before 9am offer the calmest water and best fishing before boat traffic picks up. If you're visiting for the first time, check the DNR boat landing locations before you arrive — some are well-marked, others take a local to find. Know something about Townline Reservoir* that visitors should? Share a tip at staynorthern.com/contact — we add the best ones to this page.
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
Ice out typically arrives in mid-April on central Wisconsin lakes. Fishing season hits its stride in mid-May and runs strong through June and again in fall. Swimming conditions are best from late June through mid-August. Fall color peaks in early-to-mid October. Ice fishing season runs late December through February in most years.
Condition data sourced from Wisconsin DNR surveys. Real-time weed and clarity reports coming soon.
Frequently Asked Questions
What fish can you catch in Townline Reservoir*?
Townline Reservoir* is home to Northern Pike. Wisconsin fishing regulations apply — check current seasons and size limits before heading out.
Can you boat on Townline Reservoir*?
Townline Reservoir* 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 Townline Reservoir*?
Townline Reservoir* has 395 acres in surface area, a maximum depth of 10 feet.
What is the bottom of Townline Reservoir* like?
The lake bottom is composed of 60% sand, 0% gravel, 0% rock, 40% muck. Sandy and gravel bottoms typically support good swimming and healthy fish habitat.
Are there invasive species in Townline Reservoir*?
No invasive species are currently documented in Townline Reservoir* by the Wisconsin DNR. Always clean, drain, and dry your boat before leaving to help protect this lake.
Where is Townline Reservoir* located?
Townline Reservoir* is located in Marathon, Portage County, Wisconsin. GPS coordinates: 44.6917° N, 89.8161° W.
Are there vacation rentals on Townline Reservoir*?
Stay Northern is building the most complete rental directory for Marathon, Portage County lakes. Check our Townline Reservoir* vacation rentals listing — if none are available yet, check back soon or browse nearby Marathon, Portage County lake rentals.
Fishing Regulations
Current season regulations for Townline Reservoir*
| 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 | The minimum length limit is 26" and the daily bag limit is 2. | — |
| 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
- 1414800
- County
- Marathon, Portage County
- Surface Area
- 395 acres
- Max Depth
- 10 ft
- Bottom
- 60% sand, 0% gravel, 0% rock, 40% muck
- Lake Type
- flowage
- Coordinates
- 44.6917, -89.8161
Boat Rentals Nearby
Pontoon
Listing soonFishing Boat + Motor
Listing soonKayak / Canoe
Listing soonKnow a local boat rental operator near Townline Reservoir*? Let us know.
Lake data sourced from the Wisconsin DNR. Last updated 4/29/2026.