Sponsored by:Celebrate San Antonio’s rich history and culture at the 11th Annual World Heritage Festival, happening September 9–13. This family-friendly celebration invites residents and visitors to honor and explore Texas’s only UNESCO World Heritage Site: the historic San Antonio Missions. Fun Run : An untimed, high-energy 5K or 10K run winding through Mission San José and the scenic Mission Reach trails. : An untimed, high-energy 5K or 10K run winding through Mission San José and the scenic Mission Reach trails. Walk: A relaxed, family-friendly 5K or 10K walk highlighting Mission San José, the Mission Reach trails, and the historic Hot Wells Ruins.