Rock glaciers are critical features in deglaciating watersheds, exerting increasing influence on mountain hydrology and hydrogeology as glaciers retreat. However, their hydrological dynamics within broader systems remain understudied. The unfrozen basal layers of rock glaciers function as reservoirs and flow pathways, facilitating enhanced water percolation and flow toward their base and bedrock interface. This prompts investigation into the role of rock glaciers in deep infiltration and groundwater recharge. Our study focused on Shar Shäw Tágà in the St. Elias Mountains (Yukon), on a ‘glacier-debris-covered glacier-rock glacier’ system experiencing significant glacial retreat. Using drone-based thermal imagery, we first identified cold outflows from the rock glacier and then conducted hydrochemical sampling across three campaigns in June 2022, August 2022, and June 2023. Sampling encompassed 15 springs at the rock glacier's front and glacial streams in the upper catchment, analyzing solute concentrations and stable isotopic composition of water. We applied a water budget and mass balance model to estimate expected discharge, comparing it with observed spring discharge. Results indicate that most springs at the rock glacier's front are supported by snowmelt and redistributed rainfall. However, depleted signatures, linked with glacial meltwater, were discernible in certain springs. A significant proportion of glacial meltwater appears to not reach the rock glacier’s front, suggesting substantial infiltration from the root zone of the rock glacier. These findings underscore the potential of permafrost and depositional features to connect deglaciating hydrological systems with deep groundwater systems, essential for understanding water resource dynamics post-glacial retreat.