Portland International Raceway is back on the IndyCar Series schedule in 2018.
The Sept. 2 race on the 1.967-mile permanent road course will be IndyCar's first trip to the Oregon track since races were held from 1984-2007 under CART and Champ Car sanction.
The race will be operated by Green Savoree Racing Promotions, which also promotes the IndyCar events at St. Petersburg, Toronto and Mid-Ohio.
Portland replaces Watkins Glen, New York, on the schedule.
There were no other major changes on the 17-race schedule as IndyCar sought stability in assembling its 2018 calendar.
The race at Phoenix is returning to the first weekend in April. The race had moved this year to avoid conflicting with the NCAA men's basketball Final Four taking place in nearby Glendale, Arizona.
2018 IndyCar Series schedule
March 9-11 St. Petersburg, FL
April 6-7 Phoenix Raceway, AZ
April 13-15 Long Beach, CA
April 20-22 Barber Motorsports Park, AL
May 11-12 GP of Indianapolis
May 15- Indianapolis 500
June 13 Dual in Detroit, MI (2 races, Sat. & Sun)
June 8-9 Texas Motor Speedway, TX
June 22-24 Road America, WI
July 7-8 Iowa Speedway, IA
July 13-15 Toronto, ON, Canada
July 27-29 Mid-Ohio SportsCar Course, OH
Aug. 18-19 Pocono Raceway, PA
Aug. 24-25 Gateway Motorsports Park, IL
Aug. 31-Sept. 2 Portland International Raceway, OR
Sept. 14-16 Sonoma Raceway, CA