Description:During a recent race in Bogota, cyclists charged through a crime-ridden slum. They swerved to avoid drunken men and mothers pushing baby carriages down potholed streets. Several riders were chased by dogs. But for bike racers, Colombia has at least one feature in common with France. With several peaks topping 17,000 feet, Colombia’s three Andean Mountain ranges can be even more challenging than the Alps.(1:21)