The paper presents the results of an experiment in the use of hydrological parameters to study the internal structure of a rock glacier. The rock glacier selected for the study lies at the head of Grizzly Creek in the southwest Yukon Territory. The hydrological network suggests two independent drainage systems, which demonstrate the occurrence of a planar impervious structure at depth and independent lines of drainage controlled by the flow structures in the near-surface deposits. Chemical changes in the water are inconclusive with respect to the evaluation of ice contents of the landform although the physical evidence strongly suggests no massive ice component. Chemical characteristics of each drainage system are sufficiently different that chemical tests can be used to differentiate sources of the drainage.