river in SC Ariz., flowing into the Gila River: c. 200 mi (322 km)
Origin:
because of the saltiness of the lower stream
See Salt River in American Heritage Dictionary 4
A river, about 322 km (200 mi) long, rising in eastern Arizona and flowing generally west to the Gila River near Phoenix. It has been used for irrigation for many centuries.
A river rising in northeast Missouri and flowing about 322 km (200 mi) southeast to the Mississippi River.