The ‘Riviera of the South China Sea’ is CHALLENGE FAMILY’s latest race destination with today’s announcement of the half distance CHALLENGE VIETNAM in the beautiful city of Nha Trang on 11 September 2016. CHALLENGE VIETNAM will run alongside Nha Trang’s six kilometre stretch of beautiful coastline with its white sandy beaches, clear waters and an abundance of marine life, thriving reefs with verdant mountain ranges at each end