At age thirty-five, Smyth made her official debut for the 2008 Summer Olympics in Beijing, where she competed in the women's marathon, along with her teammates Benita Johnson and Lisa Weightman.
Lyndon B. Johnson | Samuel Johnson | Johnson & Johnson | Dwayne Johnson | Boris Johnson | Johnson | Andrew Johnson | Lyndon B. Johnson Space Center | Magic Johnson | Robert Johnson | James Weldon Johnson | Jack Johnson | Kevin Johnson | Jimmie Johnson | Don Johnson | Randy Johnson | Betsey Johnson | Lionel Johnson | Holly Johnson | Van Johnson | Molly Johnson | Amy Johnson | Glen Johnson | Gary Johnson | Dwayne "The Rock" Johnson | David Johnson | Robert Johnson (musician) | Rida Johnson Young | Philip Johnson | Nunnally Johnson |
The race featured over 4000 competitors at its inaugural edition, and also succeeded in attracting high-calibre elite athletes such as marathon world record breakers Haile Gebrselassie and Catherine Ndereba, as well as Australian 2008 Olympians Craig Mottram and Benita Johnson.