The youngest female to run 100 marathons is Marina White (USA, b. 11 April 1986), aged 26 years 186 days when she completed the Amica Marathon in Newport, Rhode Island, USA, on 14 October 2012.

Marina ran the first marathon at the Pacific Shoreline Marathon (now Surf City) on 4 February 2007. She completed four more marathons in 2007, eight more in 2008, 28 in 2009, 12 in 2010, 19 in 2011 and the final 28 marathons in 2012. Some of the most notable marathons Marina ran were the Kilimanjaro Marathon in February 2012 and an incredible seven marathons on consecutive days from 28 June to 4 July 2012.