HALF IRON MONTERREY MEXICO - Let's start with the swim. The swim course takes place in the Santa Catarina River, where athletes will dive into crystal-clear waters and swim a total of 1.2 miles. The river is calm, so there are no worries about choppy waves. The water temperature can range from 68-73°F (20-23°C) depending on the weather. The fast 90KM bike course is almost flat with a few vehicle bridge elevations. The course comprises two laps along the express lane of Constitution Freeway. ...