The Raush River is a tributary of the Fraser River in British Columbia, Canada. It drains a watershed of approximately on the eastern flanks of the Cariboo Mountains, a sub-range of the Columbia Mountains. The river joins the Fraser near the community of Dunster in the Robson Valley. The river's name is the result of a transcription error; it was originally called the Rivière au Shuswap, this was recorded on some maps as R.auSh., which then became Raush on official maps. Its source is the Raush Glacier, and major tributary creeks include Black Martin and Quanstrom.