Half Distance Triathlon Oregon: Tailored Training for a Fast, Scenic, and Demanding Course Prepare to excel at the Half Distance Triathlon Oregon with a comprehensive training plan designed specifically for the course's terrain, conditions, and race-day challenges. This event begins with a 1.2-mile swim in the Willamette River, where a favorable downriver current at an average temperature of 65°F (18°C) offers a faster swim with less resistance. Athletes then tackle a 56-mile bike course ...