Duncan Lake

How big is Duncan Lake?

How deep is Duncan Lake?

What kind of fish can you catch in Duncan Lake?

Are there places to eat and drink near Duncan Lake?

A temperature-dissolved oxygen profile was collected in the deepest basin on Duncan Lake on August 10th, 2023 to evaluate the amount of cold, oxygenated water (i.e., oxythermal habitat) available to Lake Trout and Cisco, also known as Tullibee. Based on the profile, the top of the thermocline (i.e., the location in the water column with the sharpest transition from warm to cold water) occurred at approximately 17 feet. Dissolved oxygen decreased to below 3.0 mg/L at 100.0 feet, which was below the thermocline, at the time of sampling. The temperature at which dissolved oxygen decreased to below 3.0 mg/L (i.e., TDO3, a single variable to characterize oxythermal habitat) was 4.7°C (40.5°F).

TDO3 values cooler than 8.8°C for Lake Trout or 21.5°C for Cisco indicate that oxythermal conditions are favorable for these species. Dissolved oxygen concentrations below the thermocline indicate that suitable oxythermal habitat for these species was available across a range of depths at the time of sampling. Data collected in 1993-2013 further indicate suitable oxythermal habitat across years. When adequate oxythermal habitat is available, Lake Trout or Cisco are not squeezed into unfavorable, warmer water conditions and therefore do not experience higher levels of stress.