Travelers are voting Bull Run River, Clackamas River and Columbia Slough as the best of 21 rivers in Multnomah County. There are 25 rivers near Portland a city just 35 km from Multnomah County and 26 rivers near Milwaukie which is 35 km distant. The most popular of these are Gales Creek near Portland and Clackamas River in Milwaukie. You can find 154 rivers in Oregon and 3914 rivers in the country of United States. Our members favorite in Oregon is Gales Creek and Cuyahoga River is the top pick in United States. Want more? Check out our map of rivers in Multnomah County.