Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Pack River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Pack River, the highest being situated at an altitude of ft, the .

The Pack River is a 50-mile-long tributary of Lake Pend Oreille in northern Idaho. It flows through the Selkirk Mountains and has a rich history of trapping and logging. The river's hydrology is primarily snowmelt, and it has several small reservoirs and dams, including the Colburn Dam and the Pack River Flume Dam. These dams were built to provide irrigation for agriculture, and the river is also used for recreational activities such as fishing, kayaking, and rafting. The Pack River is home to a variety of fish species, including rainbow trout, cutthroat trout, and bull trout. Despite its relatively short length, the Pack River is an important part of the region's ecosystem and plays a significant role in supporting local agriculture and tourism.