2009 World Masters Athletics Championships is the eighteenth in a series of World Masters Athletics Outdoor Championshipsthat took place in Lahti, Finland from 28 July to 8 August 2009. The main venue was Lahden Stadion located within Lahden Urheilukeskus.Supplemental venues included Radiomäen urheilukenttä in Radiomäki, Nastola Sport Field, Kisapuisto Field for throwing events,and Fellmaninpuisto for start and finish of the Marathon. The WMA is the global governing body of the sport of athletics for athletes 35 years of age or older, setting rules for masters athletics competition.