Moosehead is the biggest lake in Maine, and it is not close. The IF&W survey puts it at 74,890 acres, roughly 40 miles end to end, with 246 feet of water at the deepest point. Greenville sits at the south end and is the supply town. Rockwood sits partway up the west shore where the Moose River comes in, and north of there the shoreline goes quiet fast. IF&W lists the principal fishery as landlocked salmon, lake trout (togue, if you want to sound local), brook trout, and burbot, the eel-shaped fish everyone up here calls cusk. The whole system runs on rainbow smelt, and IF&W is blunt about the tradeoff: when togue numbers climb, they outcompete salmon for smelt and salmon growth falls. Three river fisheries (the Roach, the Moose, and the East Outlet, where the Kennebec leaves the lake) depend directly on Moosehead’s adult salmon and brook trout, and IF&W calls them fisheries of regional and statewide significance. That is a lot riding on one lake.

Species and seasons

| Species | Wild or stocked | Prime windows | Where we’d start | | --- | --- | --- | --- | | Landlocked salmon | Stocked and wild; stocking tops up a wild population | Ice-out into June near the surface, deep in July and August, staging off river mouths in September | Flat-lining a streamer off Rockwood near the Moose River mouth | | Lake trout (togue) | All wild; last stocked in 1975 | Mixed in with the salmon right after ice-out, then deep structure the rest of the season | Deep humps and points on the main lake, trolled slow or jigged | | Brook trout | All wild; IF&W found stocking produced poor results here | May and June along shorelines and tributary mouths, again in September | Coves and rocky shoreline early and late in the day |

Burbot (cusk) round out the principal fishery on IF&W’s list. The lake also holds smallmouth bass (introduced in the mid-1970s), white perch (introduced in 1984), and yellow perch (mid-1950s). None of the three are native here, and the salmon crowd mostly treats them as bycatch, but the smallmouth will save a slow midday if you drop a tube on the rocks.

Where to launch

Moosehead has real trailered access spread over its whole length. IF&W’s regional guide and survey list seven improved launches:

  • Greenville: the Route 6 launch and the Lily Bay Road launch, both improved, plus the launch inside Lily Bay State Park.
  • Rockwood: the Route 6 launch, the handy one for the Moose River mouth and the west-shore water.
  • Spencer Bay Township: the Hardwood Valley Road launch on the east side.
  • The north end: the Seboomook Dam Road launch at Seboomook and the Ross Farm Road launch at Northeast Carry, for the remote upper lake.

Greenville is where you fuel up, buy tackle, and get a real breakfast. North of Rockwood, plan on carrying everything you need. And treat the lake with the respect you would give the coast: 40 miles of open water builds serious waves when the wind comes up, and the crossings are long. Check the forecast before you commit to the far shore.

Check the rules before you keep anything

Two layers matter here. The statewide general-law defaults for the fish you are most likely to boat are 2 landlocked salmon at a 14 inch minimum and 2 togue at an 18 inch minimum (2026 law year). But those are only defaults. Maine attaches special S-code rules to individual waters, the special rule always overrides the general law, and premier salmon and togue waters commonly carry their own length and bag rules. Look up Moosehead Lake itself in IF&W’s free FLOAT tool before your trip, and look up any river you step into separately, because nothing transfers.

Our Maine fishing seasons and regulations guide explains how the whole system works, and if you still need a license, the Maine fishing license guide covers costs and where to buy one.

Tactics by season

Ice-out through June: flat lines and streamers

Early season is the reason people make the long drive to Greenville. Right after ice-out the bait is shallow and so is everything that eats it. The classic move is a tandem streamer, a Grey Ghost being the classic of classics, flat-lined 20 to 30 feet behind the boat on light mono and pulled fast enough that it darts like a fleeing smelt. Speed matters more than pattern. Work the river mouths, the shoreline drops, and the points, and keep the rod where you can see it. The Moose River mouth at Rockwood is an obvious morning stop, and the water off the Greenville launches produces without a long run.

July and August: lead core water

By midsummer the surface warms and the fish slide down. This is lead core water: 2 to 4 colors puts a Mooselook Wobbler in the salmon zone, and the togue set up deeper still on the humps and points of the main lake. With 246 feet of depth available, the fish always have cold water; your job is to find the bait on the sounder and run your lines at that level instead of guessing. Mornings still beat afternoons, and a calm evening can turn the surface bite back on briefly.

September: the river mouths

September pulls adult salmon and brook trout toward moving water, and the mouths of the Roach, the Moose, and the East Outlet gather fish that spent the summer scattered over thousands of acres. Trolling tight to those areas is the play from a boat. If you follow the fish into the rivers themselves, general law flips flowing water to artificial-lures-or-flies-only from August 16 through September 30, and rivers with reputations like these do not run on general law assumptions. Look each one up in FLOAT before you make a cast.

A word on winter

Under Maine’s general law, North Zone lakes and ponds are closed to all fishing from October 1 through March 31, and ice fishing happens only where a special regulation opens a specific water. Moosehead’s winter picture is exactly the kind of water-specific question the law book exists for, so check the current listing before you plan an ice trip. We will cover the hard-water side separately.

Where to go from here

If wild brook trout are the real draw, our Maine brook trout guide covers the waters where they still hold their own. For salmon trolling without the North Woods drive, Sebago Lake is the southern counterpart, a deeper lake at 316 feet with its own wild togue story. And whichever water you pick, sort your license and check the current rules before you go. Moosehead rewards the anglers who do the homework, and it has been doing that since before any of us were born.

Common questions

How big is Moosehead Lake?

Moosehead is Maine's largest lake at 74,890 acres, roughly 40 miles end to end, with a maximum depth of 246 feet. Sebago is deeper at 316 feet, but nothing in Maine comes close to Moosehead's surface area.

What fish are in Moosehead Lake?

IF&W lists the principal fishery as landlocked salmon, lake trout (togue), brook trout, and burbot (cusk). Smallmouth bass, white perch, and yellow perch were introduced later and are present too. The togue and brook trout populations are entirely wild.

When is the best time to fish Moosehead Lake?

The weeks right after ice-out are the classic window, when salmon and togue feed near the surface and a trolled streamer works all day. In July and August the fish go deep but stay catchable on lead core. September pulls salmon and brook trout toward the river mouths.

Is Moosehead Lake stocked?

Partly. IF&W stocks landlocked salmon to supplement a wild population, but the togue have been entirely wild since stocking ended in 1975. The brook trout fishery is wild too, because stocking produced poor results here.