Photos: Racers brave the obstacle course at 'Rugged Maniac'

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Rugged Maniac at Portland International Raceway
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  • Rugged Maniac at Portland International Raceway
  • Rugged Maniac at Portland International Raceway
  • Rugged Maniac at Portland International Raceway
  • Rugged Maniac at Portland International Raceway
  • Rugged Maniac at Portland International Raceway
  • Rugged Maniac at Portland International Raceway
  • Rugged Maniac at Portland International Raceway
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Rugged Maniac at Portland International Raceway
Participants braved the muddy obstacle course at Portland International Raceway. - 6/1 - (Kai Hayashi / KATU.com)