Half Distance Triathlon Tours Métropole - Loire Valley France: Race Through History with a Purpose-Built Training Plan Swim in the historic River Cher. Bike past Loire Valley castles. Run through lush French parks. The Half Distance Triathlon Tours Métropole – Loire Valley offers a course unlike any other—flat, fast, and filled with iconic French scenery. To make the most of this one-of-a-kind experience, you need more than just motivation. You need a smart, structured training plan that ...