Final answer:
The Yukon River runs east to west and bisects Alaska. It is known for the Chinook salmon that spawn in its creeks.
Step-by-step explanation:
The river that runs east to west and bisects Alaska, known for the Chinook salmon that spawn in its creeks, is the Yukon River. The Yukon River is approximately 1,980 miles long and is one of the longest rivers in North America. It originates in British Columbia, Canada, and flows through the Yukon Territory in Canada and Alaska in the United States.