Starting 1 February 2012 he improved on this by completing the seven on 7 in beneath 120 hrs or in fewer than 5 days. The men's London 2012 Summer Olympic marathon winner was Stephen Kiprotich of Uganda (2:08:01). Per capita, the Kalenjin ethnic team of Rift Valley Province in Kenya has generated a hugely disproportionate share of marathon and track-and-area winners. 1908 Summer Olympics in London.