Columbia is a river that is 2,250 kilometers (or 1,398 miles) long and drains from a 415,211 km2 drainage basin in United States and Canada.
Columbia discharges at 7,500 m3/3 and flows out into Pacific Ocean.
Fraser is a river that is 1,368 kilometers (or 850 miles) long and drains from a 220,000 km2 drainage basin in Canada.
The average volume of water flow is 3,475 m3/3 and the river flows out into Pacific Ocean.
More on the longest and largest river systems in the world: