Rock Creek is a 52-mile (84 km) river in Missoula and Granite County, Montana.

[3][4] Rock Creek is also a stream in south central Montana in Carbon County.

It flows from Glacier Lake, travels south into Wyoming before turning north back into Montana.

The 2022 Montana floods at Rock Creek caused catastrophic damage to parts of Red Lodge.

[5][6] Rock Creek is a popular fly fishing river for locals and destination anglers.