But that year 's Ironman included the first female entrant -- cyclist Lyn Lemaire from Boston -- who finished fifth overall by clocking in at under 13 hours .
The 1979 race was postponed one day , which limited the number of competitors involved .
That year 's Ironman included the first female entrant -- cyclist Lyn Lemaire from Boston -- who finished fifth overall by clocking in at under 13 hours .
The 1979 race was postponed one day , which limited the number of competitors involved .