Chantal Langlacé is a French long-distance runner who is recognized by the International Association of Athletics Federations as having set a world best in the marathon on two occasions. Langlacé set a world best mark on 27 October 1974 with a 2:46:24 performance in Neuf-Brisach, France, then recaptured it from American Jacqueline Hansen on 1 May 1977 with 2:35:16 in Oiartzun, Spain. Chantal Langlacé (France) set the women's marathon world record of 2:35:15.4 in Oiartzun, Spain on May 1, 1977. It stood 4 months, until Christa Vahlensieck's 2:34:47.5 on September 10, 1977. Wiki link