Snowmelt is a critical contributor to the outflow of northern mountain catchments, making snow a key hydrologic driver for regional water resources. While snow cover physical properties such as snow depth, snow density and albedo, change throughout the winter, they are also highly spatially variable. Periodic monitoring snow evolution or having snapshot of its spatial heterogeneity overlooks the physical complexity of snow cover. The objective of the study is to measure the impact of rock debris on snow cover by combining repetitive snow depth mapping with time lapse thermal camera imagery. The data presented were collected from the Shar Ta Gà’ (Grizzly Creek) research site, a subarctic catchment in the Kluane Mountains, southwest Yukon Territory. From June 12 to June 20, 2022, a multimethod fieldwork approach was used to characterize melting of the snowpack, with a particular attention paid to the impact of boulders that became uncovered as the snow melted. We combined time-lapse thermal imagery and snow surface mapping with terrestrial laser scanning and structure from motion photogrammetry to access the temporal evolution of area of snow affected by near rock debris. The results show that during the melting period, rock debris can increase the surrounding snow melting. The findings provide an improved understanding of heterogeneous seasonal snow melt in a northern mountain catchment, with implications for hydrologic modelling and forecasting.