The Half Distance Triathlon Oregon features a 1.2-mile swim in the Willamette River, starting at Minto Brown Island Park. The downriver current provides a natural speed advantage, while the average water temperature of 65°F (18°C) creates comfortable conditions for a strong swim. The 56-mile bike course is an out-and-back route along rolling hills and country roads beside the river, characterized by mostly flat terrain and gentle curves, ideal for steady, fast pacing. The final 13.1-mile run ...