 During the river 's flow through eastern Alaska , and before it intersects the Tanana River , the Yukon flows through the Central Plateau region of Alaska . During the millions of years of its flow , it has cut through ridges , forming canyons in some places near its juncture with the Tanana . One of the deepest of these canyons is known as Rampart Gorge , or Rampart Canyon . The gorge is located 31 miles ( 50 km ) downstream of the village of Rampart , 36 miles ( 58 km ) upstream of the village of Tanana , and immediately downstream from the mouth of Texas Creek . It is named for the nearby village of Rampart , Alaska , a former gold @-@ mining community now home to subsistence fishermen . 
