Heriot-Watt graduate Freya Murray was the best placed of the team GB, 9:07 back in 44th place. The 28 year old structural engineering graduate and sports scholar replaced Paula Radcliffe, who was forced to withdraw following injury.
Murray represented Scotland in the 5,000 metres and 10,000 metres in the 2010 Commonwealth Games and was the first Scottish woman to represent GB in an Olympic marathon since Liz McColgan in 1996 in Atlanta.
Freya said: "It was a brilliant experience for me and, hopefully, a stepping stone to Glasgow 2014 and Rio 2016."
Michael Jamieson, former sports scholar 2006-2007, won silver in the men's 200m breaststroke final with a new British record of two minutes 7.40 seconds.
Michael said: "I couldn't have done any more. It was everything I hoped it would be - the crowd bringing me down the final 50m was the greatest experience of my life."
Shauna Mullin (Management with Business Law 2006) and her partner Zara Dampney beat Canada in their opening Olympic match but failed to reach the last 16 after losing to Austria on 3 August 2012.
Shauna said: "We just want to thank everyone for coming out and supporting us. It's been an incredible week for us. We brought our game home to Britain and it's been just amazing for us, thanks to everyone."