Lake of the Isles

Wellesley Island, New York
Managed by Upper St. Lawrence Riverkeeper
Celebrate the St. Lawrence River with us! 40 years as the voice for the River - join today

Lake of the Isles is one of the most unique features of the Thousand Islands. Lake of the Isles is not entirely enclosed, as most lakes are, but instead it is interestingly situated in the middle of Wellesley Island. The western end of the lake touches DeWolf Point State Park and the eastern end extends past Hill Island (Canadian), where the lake then opens up to the St. Lawrence River. Lake of the Isles also boasts some of the warmest water temperatures on the St. Lawrence River and is a great location for wildlife sightings.

Those interested in accessing Lake of the Isles by boat should enter from the Northeast end of Wellesley Island (navigation chart or GPS unit strongly encouraged). If interested in visiting Lake of the Isles by car, the best option is to head to DeWolf Point State Park.

WATER QUALITY
  • Passed water quality tests at least 95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on August 27th, 2018. Upper St. Lawrence Riverkeeper updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
CURRENT WEATHER
4°C
Cloudy
  • Report Pollution
MONITORING FREQUENCY

Lake of the Isles is sampled weekly from July 3rd to August 28th

SOURCE INFORMATION

Recreational public beaches in upstate New York are tested at least once every week typically from mid-June to September. Freshwater beaches in New York are posted when a single sample exceeds 235 E. coli / 100 ml or when the geometric mean of samples collected over a 30-day period exceeds 126 E. coli / 100 ml.

Chapter I of the State Sanitary Code Subpart 6-2 includes more criteria for freshwater quality, but most monitoring agencies rely on the E. coli standard.

WATER QUALITY GRAPH

Lake of the Isles

Wellesley Island, New York
Managed by Upper St. Lawrence Riverkeeper
WATER QUALITY
  • Passed water quality tests at least 95% of the time
  • Historical Status
  • This status is based on the latest sample, taken on August 27th, 2018. Upper St. Lawrence Riverkeeper updates the status of this beach as soon as test results become available. These results were posted to Swim Guide on at
For water quality icon legend, click:   
CURRENT WEATHER
4°C
Cloudy
Celebrate the St. Lawrence River with us! 40 years as the voice for the River - join today

Lake of the Isles is one of the most unique features of the Thousand Islands. Lake of the Isles is not entirely enclosed, as most lakes are, but instead it is interestingly situated in the middle of Wellesley Island. The western end of the lake touches DeWolf Point State Park and the eastern end extends past Hill Island (Canadian), where the lake then opens up to the St. Lawrence River. Lake of the Isles also boasts some of the warmest water temperatures on the St. Lawrence River and is a great location for wildlife sightings.

Those interested in accessing Lake of the Isles by boat should enter from the Northeast end of Wellesley Island (navigation chart or GPS unit strongly encouraged). If interested in visiting Lake of the Isles by car, the best option is to head to DeWolf Point State Park.

  • Report Pollution
MONITORING FREQUENCY

Lake of the Isles is sampled weekly from July 3rd to August 28th

SOURCE INFORMATION

Recreational public beaches in upstate New York are tested at least once every week typically from mid-June to September. Freshwater beaches in New York are posted when a single sample exceeds 235 E. coli / 100 ml or when the geometric mean of samples collected over a 30-day period exceeds 126 E. coli / 100 ml.

Chapter I of the State Sanitary Code Subpart 6-2 includes more criteria for freshwater quality, but most monitoring agencies rely on the E. coli standard.

WATER QUALITY GRAPH



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