The Canadian Arctic is rapidly warming due to climate change. As increasing ground temperatures cause permafrost to thaw, it no longer acts as a barrier to groundwater flow, increasing hydrologic connectivity between surface and groundwater systems. Observed increases in streamflow across (sub)Arctic Canada have been linked to thaw, with the Tstìdeè (La Martre River) in central Northwest Territories (NWT) increasing in discharge more than any other gauged catchment in the region. Characterization of permafrost in the watershed is limited to predominant landcovers, including wetlands and forests underlain by low permeability clays and tills. In contrast, there has been minimal study of high permeability, fractured bedrock outcrops found in the headwaters, despite potential for localized permafrost thaw. It is hypothesized that permafrost in bedrock would thaw more rapidly due to the higher thermal conductivity of bedrock relative to surrounding soils. This would allow precipitation to more easily infiltrate and recharge deeper groundwater, driving flow across the catchment and greater discharge into the river. Temperature sensors have been installed across landcover types within the watershed, and rock cores have been collected. Preliminary results will be presented, including a comparison of surface bedrock temperatures across landcovers. Additionally, bedrock thermal conductivity measurements will support a predictive model of permafrost occurrence. Findings will improve the understanding of permafrost thaw in fractured bedrock environments, prevalent across the (sub)Arctic. Results will support future study of permafrost thaw-groundwater interactions, crucial for predicting changes in Arctic river systems and managing associated risks to wildlife and communities.