June 27, 2013 to June 30, 2013 – Portland Int'l Raceway, Portland, OR 37th Annual HMSA Portland Historic Races Organized by Hmsausa | Type: 37th, annual, hmsa, portland, historic, races
August 31, 2013 to September 1, 2013 – Portland Int'l Raceway, Portland, OR SOVREN Columbia River Classic Organized by SOVREN | Type: sovren, columbia, river, classic
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