The Pack River Delta is located at the mouth of the Pack River, where it enters Pend Oreille Lake. It is a meandering river with floodplains and oxbows.
During spring and fall migrations, Pack River Delta supports thousands of waterfowl (Tundra Swans, Canada Geese. Redheads, Lesser Scaup, Common Goldeneye, Common Merganser, Mallard, American Wigeon, and Ring-necked Ducks) and Common Loons. During the summer, Osprey, Bald Eagles, and Great Blue Herons nest along the shoreline. Bald Eagles also use the area for foraging during high waterfowl concentrations.
Operation of Albeni Falls Dam causes continuing erosion. To help combat this problem, the Albeni Falls mitigation program is being funded by the Bonneville Power Administration.
Pack River meanders and oxbows in a wide floodplain.
Pack River Delta is part of the Pend Oreille Wildlife Management Area. The public may use this site for hunting access, wildlife viewing, and canoeing.