# 10 clearest lakes in Minnesota > Minnesota's clearest lakes are concentrated mainly in the forested north, where deep glacial basins receive less soil runoff than many shallow lakes in farm country. Several standouts allow a Secchi disk to remain visible far below the surface. Others combine consistently transparent... Canonical URL: https://www.argo.net/10-clearest-lakes-in-minnesota/ Byline: ARGO.net Editorial Team Published: 2026-08-21T23:42:08+00:00 Updated: 2026-08-23T21:55:44+00:00 Categories: Statistics, Water ![Vibrant stones beneath the clear waters of Lake Superior in Duluth, Minnesota](https://www.argo.net/wp-content/uploads/2026/08/clear_Minnesota_lake.jpg) Minnesota's clearest lakes are concentrated mainly in the forested north, where deep glacial basins receive less soil runoff than many shallow lakes in farm country. Several standouts allow a Secchi disk to remain visible far below the surface. Others combine consistently transparent water with long monitoring records and watersheds that still contain extensive forest. The ten lakes below form an evidence-based selection drawn from [Minnesota LakeFinder](https://www.dnr.state.mn.us/lakefind/index.html), Minnesota Pollution Control Agency assessments and University of Minnesota satellite work. The numbering organizes the entries; it does not claim that every lake was sampled on the same dates or with an identical method. Readers comparing this list with the planned [clearest U.S. lakes](https://www.argo.net/10-clearest-lakes-in-the-united-states/) ranking should keep those limits in view. ## How the lakes were selected A **Secchi disk** is lowered until its black-and-white pattern disappears. The depth of disappearance is the Secchi depth and a larger value generally indicates clearer water. Minnesota DNR notes that readings often peak soon after ice-out and commonly vary through the season. A reading can also stop at the lake bottom, so a shallow basin may be clearer than the recorded number suggests. The selection gives preference to lakes with documented deep Secchi readings, repeated summer measurements or clear-water descriptions from state monitoring. The [University of Minnesota](https://water.rs.umn.edu/satellite-data) also estimates clarity from Landsat and Sentinel imagery. Field readings and satellite estimates answer related questions, yet weather, dissolved color, bottom visibility and sampling dates can move a lake up or down any comparison. The same caution will apply to the planned [Michigan list](https://www.argo.net/10-clearest-lakes-in-michigan/). ## 1. Bad Medicine Lake Bad Medicine Lake in Becker County has one of the strongest published clarity records in the state. A [Minnesota DNR study](https://files.dnr.state.mn.us/publications/fisheries/special_reports/155.pdf) described average summer Secchi depths in the 6-meter range, equal to about 20 feet. The figure is a summer average rather than a single unusually clear observation. The lake occupies a deep, closed basin with no surface inlet or outlet. Its food web also helps explain the transparent water. Large **Daphnia** graze on phytoplankton, reducing the tiny suspended algae that can cloud a lake. Excellent visibility therefore reflects both the basin's setting and biological processes within the water column. ## 2. Ten Mile Lake Ten Mile Lake near Hackensack is a large, deep clear-water lake with a small watershed relative to its surface. The [DNR Sentinel Lakes profile](https://www.dnr.state.mn.us/fisheries/slice/ten-mile-lake.html) places its surface area at about 5,000 acres and its maximum depth at 208 feet. Forests and water or wetlands dominate the watershed. Less exposed soil around a lake generally means fewer suspended particles arriving after rain. The lake also has decades of monitoring rather than a lone favorable reading. Minnesota's pollution-control agency calls its water quality excellent, while a 2008 assessment recorded seasonal Secchi measurements at two stations. Ten Mile offers a useful reminder that **long-term clarity** is more informative than one exceptionally calm day. ## 3. Trout Lake in Itasca County Trout Lake near Coleraine has a documented recovery as well as unusually transparent water. The 1,890-acre basin reaches a maximum depth of 135 feet. A DNR [vegetation assessment](https://files.dnr.state.mn.us/natural_resources/water/lakes/vegetation_reports/31021600.pdf) reports that mean summer Secchi clarity from 1997 through 2006 was about 17 feet. That value combines summer observations across multiple years. Earlier mining waste and municipal wastewater affected the basin, but phosphorus declined after the wastewater discharge ended. Light now reaches enough of the lake for rooted vegetation to occur at substantial depths. Trout Lake shows why a clear-water list can also tell a story about pollution control, recovery and continued **water-quality monitoring**. ## 4. Kabekona Lake Kabekona Lake in Hubbard County is a deep ice-block basin surrounded largely by forested, though developed, shoreline. DNR's [lake vegetation report](https://files.dnr.state.mn.us/natural_resources/water/lakes/vegetation_reports/29007500.pdf) calls it one of the clearer lakes in the Park Rapids area. Mean summer Secchi depth ranged from 11 to 16 feet between 1986 and 2008. The range is more useful than a single number because it shows natural variation among years. Kabekona's water also carries some dissolved color and colored organic matter can absorb light without indicating heavy sediment or an algal bloom. Its documented **11-to-16-foot range** still places it among Minnesota's notable clear-water lakes. ## 5. Trout Lake in Cook County A second Trout Lake lies northeast of Grand Marais off the Gunflint Trail. Minnesota DNR reports that summer visibility is typically 3 to 4 meters, or roughly 10 to 13 feet. The 259-acre lake reaches 77 feet at its deepest point. Its watershed consists almost entirely of forest and wetland, with only limited development along the southeast shore. Rock dominates much of the basin, from modest boulders to blocks as large as a pickup truck. The clear water does not automatically produce dense vegetation because plants also need suitable bottom material. Trout Lake demonstrates how **rocky substrate** can preserve striking visibility while limiting the plants that many visitors associate with a healthy littoral zone. ## 6. Burntside Lake Burntside Lake west of Ely appears repeatedly in Minnesota's long-term work on cold, low-nutrient lake trout waters. The state's broad [lake assessment](https://www.pca.state.mn.us/sites/default/files/wq-lar3-01.pdf) includes years of Secchi records for Burntside and describes its chlorophyll measurements as comparatively stable. Low and steady algal abundance helps water remain transparent during summer. The 7,134-acre lake lies amid the [Burntside State Forest](https://www.dnr.state.mn.us/state_forests/forest.html?id=sft00011) and Superior National Forest lands. Forest cover reduces the exposed-soil pathways that transport sediment into water. Its size means wind can still alter near-surface conditions, so one day's view from shore should not replace the lake's longer **monitoring record**. ## 7. Wabana Lake Wabana Lake in Itasca County belongs to the same state assessment of Minnesota lake trout waters. The MPCA found that its chlorophyll measurements were stable across monitored years, with relatively small variation around the mean. Such consistency supports Wabana's place on a curated clarity list even when the exact Secchi depth changes by season. Wabana is a deep lake with coldwater habitat and a long history of agency sampling. Clear water can extend plant growth deeper, although substrate and wave exposure still influence where vegetation takes hold. Visitors should compare recent LakeFinder observations with the historic record because **water transparency** can shift after rain, heat or an algal pulse. ## 8. Bearskin Lake Bearskin Lake in Cook County is another northern lake represented in the MPCA's multi-year Secchi analysis. Its summer measurements appear across many years, allowing managers to distinguish ordinary fluctuation from a persistent change. That record is more reliable for comparison than an isolated report of seeing the bottom. The lake's cold, layered summer water supports lake trout when enough oxygen remains below the warm surface. High clarity lets sunlight travel deeper, but it does not measure oxygen or temperature. Bearskin therefore illustrates why **Secchi depth** is an important indicator rather than a complete grade of ecological health. ## 9. Gunflint Lake Gunflint Lake straddles the Minnesota-Ontario border at the end of the Gunflint Trail. The MPCA assessment charts a lengthy series of summer-mean Secchi values and found a weak decline within the period it studied. Even with that movement, Gunflint remained among the clear lake trout waters used to develop northern Minnesota nutrient expectations. Water color can complicate a visual comparison here. Dissolved organic compounds from forest soils and wetlands tint some northern lakes while leaving the water low in suspended sediment. Satellite tools measure **colored dissolved organic matter** alongside chlorophyll and clarity, giving researchers a better way to separate brown color from cloudiness. ## 10. Snowbank Lake Snowbank Lake east of Ely is a large, deep entry lake on the edge of the Boundary Waters. Minnesota's lake trout assessment identified 20 to 30 feet or more of suitable cold, oxygenated habitat during late summer. The same report groups Snowbank with northern lakes whose typical summer-mean transparency was high compared with regional reference waters. Its protected, heavily forested surroundings help limit sediment and nutrient runoff, though storms can stir exposed shallows and temporarily reduce visibility. Anyone visiting near freeze-up should also remember that clear water says little about ice strength. Argo's explanation of [how lakes freeze](https://www.argo.net/how-long-does-it-take-a-lake-to-freeze/) covers the weather and lake properties that control safe ice formation, while the [North American lake ranking](https://www.argo.net/10-largest-lakes-in-north-america-ranked-by-surface-area/) puts Snowbank's scale in a wider context. For geographic context beyond water clarity, Argo also profiles [Lake of the Woods](https://www.argo.net/lake-of-the-woods-map-size-and-depth/), [Leech Lake](https://www.argo.net/leech-lake-map-size-and-depth/) and [Namakan Lake](https://www.argo.net/namakan-lake-map-size-and-geography/). Water clarity and depth describe different properties. Argo’s [guide to Minnesota’s deepest lakes](https://www.argo.net/the-deepest-lakes-in-minnesota/) uses state bathymetric records to separate natural basins from flooded mine pits.