It took her four years of riding 25 miles a day, using seven different horse, but she made it into town just in time for the 2012 Olympic Games.
Megan Lewis, age 63, set out from Beijing shortly after the Games there in 2008 as a fundraising ride for Challenge-Aid.
After making a few appearances in London, Lewis intends to ride home to Wales.
Top photo: www.justgiving.com
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