<p>Local-scale groundwater/surface-water exchange can be a critical control on the flux of nutrients, iron, and other elements to ferruginous (iron-rich) meromictic (permanently stratified) lakes. However, the magnitude, spatial distribution, and temporal variability of these fluxes are often poorly constrained. The objectives of this study were to characterize groundwater/surface-water exchanges in a ferruginous meromictic lake situated within glacial sediments and to determine how local-scale heterogeneity in aquifer sediments and water table conditions influence those exchanges. The approach involved collecting complementary geologic, hydraulic, and geochemical field data using direct push coring, drive-point piezometers, and Waterloo profiling. Water level measurements indicated the water table was depressed with respect to the surrounding topography, likely due to the lake’s position near a recharge area, abnormally dry conditions, and high hydraulic conductivity ice contact sediments underlying the lake. Hydraulic gradients suggested the only potential for groundwater discharge into the lake (exfiltration) occurred at the lake’s northern end. Geochemical indicators of lake water (i.e., evaporative enrichment of δ¹⁸O/ δ²H, Na–Cl type major ion signature, and lake-methane influenced δ¹³C_DIC values) confirmed exfiltration at the lake’s northern end and infiltration to the groundwater system along the rest of the shoreline. In contrast, previous regional scale numerical modeling results indicated a net exfiltration condition with seepage occurring into the lake entirely along the western shoreline. This study demonstrates the importance of multiple lines of evidence derived from local-scale field measurements for characterizing water and solute exchanges between ferruginous meromictic kettle lakes and underlying aquifers.</p>