The Columbia River was named after Captain Robert Gray’s ship, the “Columbia Rediviva”. It is also called the “Big River”, “The River of the West”, or “River Oregon”. It flows through Canada in British Columbia, and in the U.S. through the States of Washington and Oregon. Its tributaries are the Spillimacheen River, Beaver River, Illecillewaet River, Incomappleux River, Kootenay River, Pend Oreille River, Spokane River, Snake River, John Day River, Deschutes River, Willamette River, Kicking Horse River, Blaeberry River, Canoe River, Kettle River, Sanpoil River, Okanogan River, Wenatchee River, Yakima River, Lewis River, Kalama River, and Cowlitz River. It is the drainage from the source of “Columbia Lake” in British Columbia. It drains an area of approximately 258,000 square miles including drainage basins from Idaho, British Columbia, Oregon, Washington, and small portions of Montana, Wyoming, Utah, and Nevada. Its median elevation is 2,690 feet above sea level and flows into the Pacific Ocean. IT is the largest river in the Pacific Northwest region of North America rising in the Rocky Mountains of British Columbia flowing northwest and then south through Washington and Oregon into the Pacific. It is 1,243 miles long. It is the fourth-largest river in the United States and powers over 14 hydroelectric dams. The river historically has been used for trade, transportation, exploration, and economy for thousands of years. Its first recorded inhabitation was more than 15,000 years ago transitioning from hunting and gathering to sedentary lifestyles along the river based mainly on salmon ca. 3,500 years ago. Skeletal remains of the Kennewick Man aged at over 9,000 years ago, were found along the Columbia River sparking debate about origins of human habitation in North America. Many Native Americans inhabit the river valleys including the Sinixt, Lakes, Secwepemc, Ktunaxa, Blackfoot, Colville, Spokane, Coeur d’Alene, Yakama, Nez Perce, Cayuse, Palus, Umatilla, Cowlitz, Chinook, Shoshone Bannock, Nch’ i-Wana, Sahaptin, and the Confederated Tribes of Warm Springs. There was once a land bridge called the “Bridge of the Gods” connecting Oregon and Washington across the Columbia River Gorge that has alot of mythology over its formation and destruction. It was believed to be from a battle between the Gods represented by Mount Adams and Mount Hood and their competition for the affection of the Goddess represented by Mount St. Helens. The bridge originally permitted increased interaction between tribes on the north and south sides of the river until its destruction.