Flagstaff Lake is a 20,300-acre reservoir in the mountains of western Maine, making it the fourth largest lake in the state. It was created in 1950 when the Long Falls Dam impounded the Dead River, flooding a valley that included the townships of Flagstaff, Bigelow, Dead River, and Carrying Place — communities whose foundations still sit beneath the water. The lake stretches roughly 15 to 18 miles through the Dead River valley, framed by the Bigelow Mountain Range to the south. Despite its enormous surface area, Flagstaff is remarkably shallow, with an average depth of just 18 feet and a maximum of 48 feet. That shallow profile shapes everything about fishing here — from where the fish hold to what species thrive. The lake and the Dead River below it together offer two distinct fisheries that attract anglers from across New England.
Fishing in Flagstaff Lake
Flagstaff Lake holds landlocked salmon, brook trout, lake trout (togue), yellow perch, chain pickerel, and smallmouth bass. The Maine Department of Inland Fisheries and Wildlife classifies the water quality as marginal for coldwater gamefish — summer temperatures can reach stressfully high levels throughout this shallow lake, pushing salmon and trout toward the few deeper areas and the mouths of cold-water tributaries. Understanding this is the most important piece of fishing advice for Flagstaff: the best fishing is not spread across the lake’s vast surface but concentrated in specific zones where conditions support cold-water species.
Where to Focus
The deeper sections of the lake, particularly near the dam on the northeast end, hold the best water for salmon and trout. Fish also concentrate near the mouths of the North Branch and South Branch of the Dead River, which enter the lake from the west and bring cooler water, especially in spring and fall. During summer’s warmest weeks, salmon and brook trout will seek out spring seeps on the lake bottom, cold tributary inflows, and whatever depth they can find. Trolling with streamer flies or small spoons along the deeper channels is a productive summer technique for salmon. In spring and fall, when water temperatures are more favorable, fish spread out more and can be found in shallower areas.
The Big Eddy area near the mouth of the Dead River (northeast end of the lake near the dam) is locally well-known for fly fishing opportunities, with free first-come-first-served campsites, a pit toilet, and direct access to both the lake and the top of the Dead River. Brook trout and salmon are the primary targets here.
Warm-Water Species
Yellow perch and chain pickerel are abundant throughout the lake and provide steady action, particularly in the extensive marshy shallows on the western end. Smallmouth bass are present as well, though Flagstaff is in Maine’s North Zone, where regulations allow unlimited bass harvest — a deliberate management decision to reduce competition with native cold-water species. Perch and pickerel fishing is good year-round, including through the ice in winter.
Lake Trout (Togue)
Flagstaff holds lake trout, which Mainers call togue. These fish require the coldest, deepest water available, so in a lake with a maximum depth of only 48 feet, they are not as abundant or as large as in Maine’s deeper lakes like Moosehead or Sebago. Still, togue are present and catchable, especially by trolling deep in spring and fall when thermal conditions are most favorable. Maine’s general law sets a 2-fish daily limit with an 18-inch minimum length for togue.
The Dead River Below the Dam
Some of the best fishing connected to Flagstaff Lake is not in the lake itself but in the Dead River that flows out of it. The river’s main stem begins at the Long Falls Dam outlet and runs approximately 20 miles northeast before entering the Kennebec River at The Forks. The river is divided into two distinct sections by Grand Falls, a set of falls located about 6 miles below the dam.
Grand Falls Flowage — Upper Dead River
The stretch between the dam and Grand Falls is called Grand Falls Flowage, a deep, slow-moving section that is best known for its rainbow trout. These rainbows, which can exceed 20 inches, come from a naturally reproducing population that likely originated from unauthorized stocking years ago. They are not abundant, but they grow large feeding on smelts that wash into the river from the lake. Brook trout and landlocked salmon are also present in this section. Most anglers fish within about a mile of the dam, wading the riffles around the Big Eddy area. Reaching the lower portions of the flowage requires a boat. Small spoons and smelt-imitating streamers (such as Grey Ghost and Black Ghost patterns) are effective, particularly in spring when larger fish are actively feeding.
Lower Dead River — Below Grand Falls
Below Grand Falls, the river becomes a 15-mile run of riffles, pools, and classic freestone trout water. The section between Grand Falls and Spencer Stream is managed as catch-and-release only and holds good numbers of wild brook trout and landlocked salmon, along with occasional rainbow trout, brown trout, and splake (a brook trout–lake trout hybrid from downstream Wyman Lake). Fish tend to be smaller here than in the flowage above Grand Falls, but the water is beautiful and the fishing pressure lighter, especially in the river’s less-accessible middle sections.
During summer, the lower Dead River runs warm, and salmon and trout concentrate near the mouths of cold tributaries like Spencer Stream and Enchanted Stream, as well as around spring seeps in the deeper pools. Spin fishing with artificial lures is legal, but fly fishing is the most popular method — nymphs, small streamers, and wet flies drifted through the pools and riffles are standard. Dry fly fishing picks up once hatches begin in mid-to-late May, with caddis patterns being among the most reliable. For more on exploring Maine’s northern backcountry, the area around the Dead River valley is prime moose country.
Regulations and Licenses
A Maine fishing license is required for anyone 16 or older. Licenses can be purchased online through the Maine Department of Inland Fisheries and Wildlife. Flagstaff Lake is in Maine’s North Zone, which generally has more restrictive cold-water species protections and more liberal warm-water harvest rules than the South Zone. Key regulations to be aware of include the catch-and-release-only section on the lower Dead River (Grand Falls to Spencer Stream), the 2-fish daily limit with 18-inch minimum for lake trout, and terminal gear restrictions that vary by water. Always check the current year’s regulation book for specific rules on Flagstaff Lake and the Dead River, as special regulations can change. Ice fishing is permitted on the lake during the winter season.
Access and Camping
Flagstaff Lake has multiple public boat launches on both the east and west ends. The lake is mostly undeveloped with relatively few motorized boats, making it excellent for kayaking and canoeing — it is part of the Northern Forest Canoe Trail, a 740-mile water route through New York, Vermont, Quebec, New Hampshire, and Maine. Be aware that sections of the lake, particularly the western shallows, are marshy and may require wading even in a canoe to navigate during low-water periods.
Free primitive camping is available at the Round Barn campsites on the lakeshore, which are first-come-first-served and include fire rings and pit toilets. These sites are accessible by water or via a short trail from the vehicle parking area. The Big Eddy area near the dam also has free rustic campsites popular with anglers. For more developed accommodations, the nearby towns of Eustis and Stratton (on Route 27) offer lodges, cabin rentals, restaurants, and supplies. The Maine Huts & Trails system operates backcountry huts in the area, including Flagstaff Lake Hut, which provides bunk lodging and meals in a remote lakeside setting.
History and Setting
The lake’s name traces to Benedict Arnold’s 1775 expedition to Quebec, when his troops reportedly camped in the valley and planted a flag. The actual communities that grew up in the Dead River valley over the following 175 years — Flagstaff, Bigelow, Dead River, and Carrying Place — were all displaced when the Long Falls Dam was completed in 1950. Foundations, cellar holes, and remnants of these towns remain on the lake bottom and are occasionally visible during low-water periods. The Dead River Area Historical Society preserves artifacts and stories from the flooded communities.
The Bigelow Preserve, a 36,000-acre public reserve on the mountain range above the lake’s southern shore, protects some of the finest high-elevation hiking in Maine. Two of the Bigelow summits exceed 4,000 feet and are popular objectives for peak-baggers on the Maine 4,000-footer list. The Appalachian Trail traverses the ridgeline above the lake, offering dramatic views down to the water. Between the fishing, the paddling, the history, and the hiking, Flagstaff Lake rewards visitors willing to make the drive into Maine’s remote northwestern mountains. For a broader Maine trip, Bar Harbor and Acadia National Park on the coast make a good pairing with the interior mountain experience, and the island destinations of New England offer yet another dimension of northeastern travel.
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