<Li> Men's Push Rim Wheelchair: Joshua Cassidy (Canada), 1: 18: 25 (set in 2012) </Li> <Li> Women's Push Rim Wheelchair: Jean Driscoll (United States), 1: 34: 22 (set in 1994) </Li> <P> On only four occasions have world record times for marathon running been set in Boston . In 1947, the men's record time set was 2: 25: 39, by Suh Yun - Bok of South Korea . In 1975, a women's world record of 2: 42: 24 was set by Liane Winter of West Germany, and in 1983, Joan Benoit Samuelson of the United States ran a women's world record time of 2: 22: 43 . In 2012 Joshua Cassidy of Canada set a men's wheelchair marathon world - record time of 1: 18: 25 . </P> <P> In 2007, astronaut Sunita Williams was an official entrant of the race, running a marathon distance while on the International Space Station, becoming the first person to run a marathon in space . She was sent a specialty bib and medal by the BAA on the STS - 117 flight of the Space Shuttle Atlantis . </P>

What country has the most participants in the boston marathon