Pskem Range runs parallel to Ugam Range to the south, and the Pskem River valley separates the ranges. The Pskem enters the Charvak Reservoir, which has the only outflow, the Chirchiq River, a major right tributary of the Syr Darya. The upper Chirchiq valley and the reservoir are bounded by Ugam Range from the north. The rivers on the northern slopes of the range flow to the Ugam River, a right tributary of the Chirchiq.