The Waatch River is a stream on the Olympic Peninsula in the U.S. state of Washington.

It originates in the northwestern Olympic Mountains and empties into the Pacific Ocean through Makah Bay.

[3] The Waatch River originates in the northwestern portion of Olympic Peninsula in the Makah Reservation.

After collecting the tributary Educket Creek the Waatch River turns west.

It empties into the Pacific Ocean at northern end of Makah Bay, south of Waatch Point and Cape Flattery, and about a mile north of the mouth of the Sooes River.