Mirror Lake basics: a shallow, weedy reservoir in the Mat-Su

Mirror Lake sits about 40 miles northeast of Anchorage in the Matanuska-Susitna Borough, accessible by the Glenn Highway and a short drive on local roads. It's a shallow, heavily vegetated reservoir—the kind of water where you'll spend as much time reading weed beds as you will casting. The lake runs roughly 2 miles long and holds pike, rainbow trout, and Dolly Varden, with pike being the dominant species and the reason most anglers make the trip.

The water is murky and tea-colored from tannins, which is normal for interior Alaska. Visibility runs 2 to 4 feet on a clear day. The bottom is soft and silty, and the shoreline is ringed with willows and spruce. There's a small parking area and a boat launch, though the ramp is rough and better suited to small skiffs, canoes, and inflatable boats than to large trailers. If you're driving a heavy rig, scout the launch before backing down.

Key Takeaways

  • Mirror Lake holds pike up to 30 inches and rainbow trout in the 12- to 16-inch range, with pike the primary target for most visiting anglers.
  • The lake is shallow and heavily weeded, so you'll need a boat or canoe to reach the clearer water and deeper holes where fish hold.
  • Summer fishing (June through August) is most reliable, though the lake can be productive into September if weather permits.
  • Pike respond to large, flashy lures and live bait; rainbows will take smaller spinners and flies, especially near weed edges at dawn and dusk.
  • The launch is small and rough; bring a canoe, inflatable, or small skiff rather than expecting a developed facility.

Pike fishing: what works and where to look

Pike are ambush hunters and they love weeds. At Mirror Lake, that means fishing the edges where open water meets dense vegetation. Cast large spoons (3/4 to 1 ounce), swimbaits, or crankbaits along the weed lines, and work them with sharp jerks to trigger strikes. Pike here will hit a lure moving fast, and they'll also take live baitfish—small whitefish or trout—suspended under a bobber in the deeper holes between weed beds.

The north and west sides of the lake tend to hold more fish than the south, partly because the wind pushes baitfish toward those banks and partly because the weed growth is thicker there. Early morning and late evening are prime times, but pike will bite throughout the day if you're fishing the right structure. Expect fish in the 18- to 28-inch range; anything over 30 inches is a bonus. The lake doesn't produce trophy pike like some other Mat-Su waters, but it's consistent for solid fish.

Rainbow trout and Dolly Varden: secondary targets

Rainbows at Mirror Lake run 12 to 16 inches on average, with a few fish pushing 18 inches. They're present but not abundant, and they're often overlooked because pike dominate the conversation. Fish for them with small spinners (size 1 or 2), small crankbaits, or flies—especially nymphs and streamers. They'll hold near weed edges and in the slightly deeper water between weed beds, and they're most active at dawn and dusk.

Dolly Varden are also present but less common than rainbows. They prefer cooler, slightly deeper water and will take the same lures as rainbows, though they're more likely to hit a streamer or a small spoon. If you're targeting both species, fish the weed edges with small gear and work methodically along the structure. You won't catch as many rainbows as pike, but the ones you do land are solid fish.

Seasonal timing and weather considerations

Mirror Lake is ice-free from roughly mid-May through October, though the exact dates shift year to year depending on spring and fall weather. June through August is the most reliable window—water temperatures are warmer, the weather is more stable, and fish are actively feeding. July is typically the peak month for both pike and rainbows.

September can be excellent if the weather cooperates, but storms roll in quickly and the days shorten fast. By late September, the lake can be rough and the air cold. October is possible but risky; ice can form overnight and the window for safe boating shrinks. Plan your trip for summer or early fall, and always check the weather forecast before launching. Wind is the main hazard here—the lake is exposed and can get choppy quickly, especially in the afternoon.

Getting there and what to bring

From Anchorage, take the Glenn Highway north toward Glennallen. Mirror Lake is signed and accessed via a short side road; the drive takes about 50 minutes. The parking area is small and can fill on weekends, especially in July. There are no services at the lake—no gas, no food, no rentals—so bring everything you need.

You'll need a boat or canoe to fish effectively. The launch is rough and unimproved, so a small skiff, canoe, or inflatable is your best bet. Bring a personal flotation device, a map or GPS unit, and a radio if you have one—cell service is spotty. The weather can change fast, so pack rain gear and a warm layer even in summer. Bring more water and snacks than you think you'll need, and tell someone where you're going and when you expect to return.

Regulations and what you need to know

You'll need a valid Alaska fishing license, which you can purchase online through the Alaska Department of Fish and Game website or at sporting goods stores in Anchorage and the Mat-Su Valley. The license is required whether you're fishing from shore or from a boat.

Mirror Lake has no special restrictions beyond the statewide regulations. Pike have no size or bag limit in this area, so you can keep what you catch. Rainbows and Dolly Varden have a combined limit of 5 fish per day with a 12-inch minimum size. Check the current Alaska Sport Fishing Regulations before you go, as rules can change. The regulations are published annually by Fish and Game and are available online and at license vendors.

Frequently Asked Questions

Is Mirror Lake good for beginners?

Yes, if you have a boat or canoe. The pike are aggressive and will hit large lures, so you don't need advanced casting skills. The main challenge is getting to the fish—you need to be on the water to reach the deeper holes and weed edges where they hold. Shore fishing is possible but limited.

What's the best lure for pike at Mirror Lake?

Large spoons (3/4 to 1 ounce) in silver or gold are reliable. Swimbaits and crankbaits also work well. Pike respond to movement and flash, so work your lure with sharp jerks rather than steady retrieves. Live baitfish under a bobber is equally effective if you want to cover more water slowly.

Can I fish Mirror Lake in September?

Yes, and it can be excellent. Fish are still active and the crowds are smaller. The risk is weather—storms develop quickly and temperatures drop. Check the forecast before you go and be prepared to leave early if conditions deteriorate.

Do I need a guide to fish Mirror Lake?

No. The lake is small enough to explore on your own, and the fish are straightforward to locate—look for weed edges and deeper holes. If you're unfamiliar with boating in Alaska or uncomfortable navigating on your own, a guide can make the trip easier and more productive.

What's the closest town with supplies?

Sutton is the nearest settlement, about 15 minutes away, but it's very small. Wasilla and Palmer, both in the Mat-Su Valley, have full services and are 45 minutes to an hour away. Stock up on fuel, food, and gear before you leave town.