Snowmelt represents a dominant annual transport pathway for terrestrial organic carbon, with peak in-stream concentrations typically occurring during spring freshet. Ongoing climate warming is expected to accelerate soil temperature increases and advance snowmelt timing, with important implications for vegetation biomass production-decomposition, soil organic carbon (SOC) storage, and export, yet studying these coupled processes remains limited in cold-region watersheds. In this study, we develop an eco-hydrologic watershed model and simulate biogeochemical processes to understand the effects of changing climate and warming soils on SOC input and export mechanisms by taking North Saskatchewan Watershed as a case study. Preliminary model results indicate that snowmelt is a dominant transport mechanism for springtime organic carbon (OC) loads. However, the magnitude of SOC available for transport varies over time and differs across eco-hydro-geologic regions. The results provide a process-based baseline for evaluating climate-driven changes in organic carbon dynamics in cold-region watersheds.