Opportunities Unlimited!. Quincy is located near the center of Washington State just 10 miles North of I-90. Quincy is the gateway to the Wenatchee Valley, Leavenworth and the Okanogan Valley if you are traveling from the South or East. Tourism is a major part of our economy. The Gorge Amphitheater, which draws an estimated 3,000 to 20,000 people per concert, is located 10 miles southwest of Quincy. Sunland Estates summer homes and the Crescent Bar Recreation area all add to our tourism along with the already available hunting, fishing, and boating. We can call Quincy a tourist and recreational paradise.