Alpena County · Michigan

Long Lake

Soundings in feet · 5,342 acres · deepest 25 ft

Today on the lake

Updated 9 Oct 2026, 3:01 am EDT. Get alerts for Long Lake

WEATHEROvernight: partly cloudy, 39°F, wind SW 5 mph. Friday: sunny, 59°F, wind NW 5 to 10 mph.

WARNINGSNo weather or fire warnings in effect.

FIRENo wildfires or prescribed burns reported within 25 miles.

BURNINGCampfires and debris burning: check today's status with Michigan DNR.

ALGAENo cyanobacteria detected by satellite on 3 Oct 2026, the latest clear-sky image.

LAUNCHESLong Lake and Long Lake County Park: listed open. Michigan DNR record updated 3 Apr 2026.

National Weather Service; National Interagency Fire Center; U.S. EPA CyAN satellite; Michigan DHHS; Michigan DNR. Weather, warnings, fires and satellite refresh when you open the page (checked at most hourly).

Depth map

5 contours, 5 to 25 ft

0510152025feet

Michigan DNR survey, fetched 7 Oct 2026. Not for navigation.

Size and depth

5,342 acres · deepest 25 ft (measured) · shoreline about 28.1 mi · clarity about 9 ft

Long Lake is the 2nd largest of the 16 named lakes of 10 acres or more in Alpena County. By Michigan DNR survey it is the 2nd deepest of the 5 with a measured depth. Its water is clearer than 10 of the other 13 lakes in the county with satellite clarity readings. Its shoreline measures about 28.1 miles along the state outline. About 33% of its area is deeper than 15 ft.

Ranks against Alpena County lakes in Michigan hydrography, Michigan DNR lake surveys and Michigan EGLE satellite clarity; shoreline measured from the state outline. How we measure

Getting on the water

2 public access sites on Long Lake.

Long Lake · Hoeft State Park · Open

1 ramp lane · 10 trailer spaces · vault toilet · Recreation Passport required

Local boating rules, Alpena County

Long Lake County Park · Alpena County · Open

4 ramp lanes · 45 trailer spaces · 15 car spaces · vault toilet · accessible restroom · Recreation Passport required

Local boating rules, Alpena County

Michigan DNR boating access, fetched 7 Oct 2026.

Fishing

Michigan DNR has stocked Long Lake 12 times since 2012. The most recent stocking was 3,200 walleye on 1 November 2025. Species stocked: bluegill, walleye, yellow perch.

12 stockings, 2012 to 2025, log scale

Latest: 1 Nov 2025: 3,200 walleye.

1 Nov 2025STOCKED3,200 walleye

9 Nov 2024STOCKED3,235 walleye

21 Oct 2023STOCKED1,900 walleye

7 May 2022STOCKED2,754 yellow perch

27 Mar 2021STOCKED4,000 yellow perch

20 Oct 2020STOCKED4,000 walleye

Source: Michigan DNR Fisheries, fetched 7 Oct 2026. How we measure

Where the deep water is

Show water deeper than

Measured from Michigan DNR contours. How we measure

Historically recorded species, from records through 1925: common shiner, rock bass, walleye, white sucker, yellow perch. Historic records, not a current survey.

Michigan Fish Atlas.

Water quality

Average water clarity is about 9 ft (Secchi depth 2.6 m, satellite readings 2018–23).

Clarity 8.7 ft of 25 ft

Michigan EGLE satellite clarity, fetched 7 Oct 2026.

Email me about Long LakeWhen it is stockedMichigan DNR has stocked Long Lake 12 times since 2012, most recently 3,200 walleye on 1 November 2025. None so far in 2026.When algae is reported or testedMichigan DHHS has no records for this lake yet. We email when the first one is posted.When satellite sees a bloom startEPA satellite, checked daily, June to October. We email when a bloom first shows on two clear days, not every day it stays. It has not happened in 2026.Any lake in Alpena CountyStockings and algae records on every lake in the county. In 2026 so far: 0 emails.

Long Lake has had no stockings or algae records in 2026, so its own alerts would have sent nothing this year. The county alert is on by default.

Email address

At most one email a week per lake. We email you a link to confirm before any alert is sent; every email has a one-click unsubscribe.

Nearby lakes with measured depth

Grand Lake25 ft deep · 6.2 mi · Presque Isle County

Lake Esau29 ft deep · 7.7 mi · Presque Isle County

Ninth Street Pond23 ft deep · 9.6 mi · Alpena County

Lake Augusta10 ft deep · 10.7 mi · Presque Isle County

Little Trout Lake4 ft deep · 14.5 mi · Presque Isle County

Devils Lake5 ft deep · 15.8 mi · Alpena County

Michigan DNR survey; straight-line miles.

Common questions

How deep is Long Lake?

Long Lake is 25 feet at its deepest point, measured by Michigan DNR survey. It covers 5,342 acres.

Is there a public boat launch on Long Lake?

Yes. 2 public access sites are listed: Long Lake; Long Lake County Park.

Is Long Lake stocked with fish?

Yes. Michigan DNR has stocked it 12 times since 2012, most recently 3,200 walleye on 1 November 2025.

How much of Long Lake is deeper than 10 feet?

About 49% of the lake's area is deeper than 10 feet, measured from Michigan DNR depth contours.