Blanche

Blanche Lake is a 1,228-acre mesotrophic (moderately fertile) lake located in central Otter Tail County approximately four miles northeast of Battle Lake, MN. An inlet from Annie Battle Lake is located on the southwest shoreline and an outlet to Otter Tail Lake is located on the north shoreline. The immediate watershed is composed primarily of mixed hardwood woodlots. Blanche Lake has a maximum depth of 64 feet; however, 82% of the lake is 15 feet or less in depth. The Secchi disk reading during the 2015 survey was 6.5 feet. Previous Secchi disk readings ranged from 6.5 to 9.0 feet. Moderate development exists along the northwest, north, and northeast shorelines. Four resorts and 133 homes/cabins were located along the shoreline during the 2000 lake survey. A state-owned public water access is located along the north shoreline. Shoal water substrates consist primarily of sand. Emergent vegetation (hardstem bulrush and common cattail) is prevalent throughout the southern portion of the lake. Emergent plants are important because they provide valuable fish and wildlife habitat and are critical for maintaining good water quality. They protect shorelines from erosion and can even absorb and break down pollutants from the water. Emergent plants provide spawning areas for fish species such as Northern Pike, Largemouth Bass, and panfish. They also are important nursery areas for all species of fish. Because of their ecological importance, emergent plants may not be removed without a DNR permit. Blanche Lake can be ecologically classified as a Walleye-centrarchid type of lake and this is reflected in the assemblage of the fish community. Walleye, Largemouth Bass, and Bluegill are the dominant gamefish species in Blanche Lake. A spring trap netting survey was conducted in 2025 to collect data on the Bluegill population. This was the first targeted assessment for Bluegill on Blanche Lake. Previous Bluegill data was obtained via standard lake survey summer trap netting. Bluegills continue to be abundant in Blanche Lake. Age data indicates that Bluegill reproduction is consistently good. Bluegill size structure is also good as 66% of the Bluegills were 7.0 inches or greater in length. Bluegills attain an average length of 7.3 inches at seven years of age. Fish sampled during this survey ranged in size from 2.0 to 9.3 inches. Anglers can maintain the quality of angling by practicing selective harvest. Selective harvest encourages the release of medium to large-size fish while allowing the harvest of more abundant smaller fish for table fare. Releasing the medium to large fish will ensure that the lake has enough spawning age fish on an annual basis and will provide anglers with more opportunities to catch large fish in the future. Blanche Lake was designated as infested with zebra mussels in 2018. Aquatic invasive species are threatening Minnesota waters. Aquatic invasive species can potentially harm water quality, water recreation, aquatic habitat, native species, and fish populations. Anglers can help prevent the introduction and spread of invasive species by following watercraft transportation laws.

Blanche Lake is a 1,228-acre mesotrophic (moderately fertile) lake located in central Otter Tail County approximately four miles northeast of Battle Lake, MN. An inlet from Annie Battle Lake is located on the southwest shoreline and an outlet to Otter Tail Lake is located on the north shoreline. The immediate watershed is composed primarily of mixed hardwood woodlots. Blanche Lake has a maximum depth of 64 feet; however, 82% of the lake is 15 feet or less in depth. The secchi disk reading during the 2015 survey was 6.5 feet. Previous secchi disk readings have ranged from 6.5 to 9.0 feet. Moderate development exists along the northwest, north, and northeast shorelines. Four resorts and 133 homes/cabins were located along the shoreline during the 2000 lake survey. A state owned public water access is located along the north shoreline. Shoal water substrates consist primarily of sand. Emergent vegetation (hardstem bulrush and common cattail) is prevalent throughout the southern portion of the lake. Emergent plants are important because they provide valuable fish and wildlife habitat and are critical for maintaining good water quality. They protect shorelines from erosion and can even absorb and breakdown pollutants from the water. Emergent plants provide spawning areas for fish species such as Northern Pike, Largemouth Bass, and panfish. They also are important nursery areas for all species of fish. Because of their ecological importance, emergent plants may not be removed without a DNR permit. Blanche Lake can be ecologically classified as a Walleye-centrarchid type of lake and this is reflected in the assemblage of the fish community. Walleye, Largemouth Bass, and Bluegill are the dominant gamefish species in Blanche Lake. Walleye abundance has remained stable over the recent series of surveys. Walleyes ranged in length from 8.3 to 18.6 inches with an average length and weight of 15.1 inches and 1.4 pounds. Walleyes attain an average length of 15.0 inches at four years of age. Catch and length data indicate that a balanced Largemouth Bass population exists. Age data indicate that bass reproduction is consistently good. Bass ranged in length from 6.3 to 15.2 inches. Largemouth Bass attain an average length of 10.7 inches at four years of age. Bluegill abundance has remained at a moderate level in recent surveys. Age data indicate that Bluegill reproduction is consistently good. Bluegill size structure is also good as 35% of the Bluegills were 7.0 inches or greater in length. Bluegills attain an average length of 7.4 inches at seven years of age. Anglers can maintain the quality of angling by practicing selective harvest. Selective harvest encourages the release of medium to large-size fish while allowing the harvest of more abundant smaller fish for table fare. Releasing the medium to large fish will ensure that the lake has enough spawning age fish on an annual basis and will provide anglers with more opportunities to catch large fish in the future.

Blanche Lake is a 1,228-acre mesotrophic (moderately fertile) lake located in central Otter Tail County approximately four miles northeast of Battle Lake, MN. An inlet from Annie Battle Lake is located on the southwest shoreline and an outlet to Otter Tail Lake is located on the north shoreline. The immediate watershed is composed primarily of mixed hardwood woodlots. Blanche Lake has a maximum depth of 64 feet; however, 82% of the lake is 15 feet or less in depth. The secchi disk reading during the 2010 survey was 8.9 feet. Previous secchi disk readings have ranged from 6.5 to 9.0 feet. Moderate development exists primarily along the northwest, north, and northeast shorelines. Four resorts and 133 homes/cabins were located along the shoreline during the 2000 lake survey. A state owned public water access is located along the north shoreline. Shoal water substrates consist primarily of sand. Emergent vegetation (hardstem bulrush and common cattail) is prevalent throughout the southern portion of the lake. Emergent plants are important because they provide valuable fish and wildlife habitat and are critical for maintaining good water quality. They protect shorelines from erosion and can even absorb and breakdown pollutants from the water. Emergent plants provide spawning areas for fish species such as northern pike, largemouth bass, and panfish. They also are important nursery areas for all species of fish. Because of their ecological importance, emergent plants may not be removed without a DNR permit. Blanche Lake can be ecologically classified as a walleye-centrarchid type of lake and this is reflected in the assemblage of the fish community. Walleye, largemouth bass, black crappie, and bluegill are the dominant gamefish species in Blanche Lake. Walleye abundance has remained stable over the recent series of surveys. Walleyes ranged in length from 7.6 to 22.9 inches with an average length and weight of 13.9 inches and 0.9 pounds. Walleyes attain an average length of 14.9 inches at four years of age. Data from a spring electrofishing assessment indicate that a balanced largemouth bass population exists. Bass reproduction appears to be consistently good. Bass ranged in length from 7.2 to 17.8 inches with an average length and weight of 12.5 inches and 1.2 pounds. Bass attain an average length of 13.0 inches at five years of age. The black crappie population is dominated by the 2004 and 2007 year classes. Size structure is good with 41% of the trap net sample measuring 10.0 inches or greater in length. Crappies attain an average length of 10.0 inches at five years of age. Bluegill abundance has remained at a moderate level in recent surveys. Age data indicate that bluegill reproduction is consistently good. Bluegill size structure is also good as 37% of the trap net sample was 7.0 inches or greater in length. Bluegills attain an average length of 7.0 inches at seven years of age. Anglers can maintain the quality of angling by practicing selective harvest. Selective harvest encourages the release of medium to large-size fish while allowing the harvest of more abundant smaller fish for table fare. Releasing the medium to large fish will ensure that the lake has enough spawning age fish on an annual basis and will provide anglers with more opportunities to catch large fish in the future.

Based on Minnesota DNR survey data, anglers target Hybrid Sunfish, Largemouth Bass, Walleye, Bluegill, and Rock Bass in Blanche. See the full species list above for catch rates, size structure, and quality scores.

Minnesota DNR records list public access for Blanche. Check the DNR LakeFinder page for the launch type and directions before you go.

Blanche has a maximum depth of 64 feet, per Minnesota DNR data.

The most recent Minnesota DNR survey data for the main sport fish in Blanche is from 2015. Surveys this old should be treated with some caution — fish populations change over time.

Yes — Blanche has confirmed zebra mussel. Clean, drain, and dry your equipment to avoid spreading invasives to other waters.