Longest Run Ever: 54 years, 8 months, 6 days, 5 h, 32 min and 20.39 sec.

www.thephuketnews.com

Yes that's real, Shizo Kanakuri is a  Japanese  marathon runner participated  during the marathon race in the 1912 Stockholm Olympics, unexpectedly (suffering from problems Food,heat...) he quit the race and returned to Japan with telling or notifying race officials and he was considered missing for over 50 years.offering him an opportunity the Swedish television contacted him to complete the race and finish the run, He accepted and took the opportunity by completing the marathon in 54 years, 8 months, 6 days, 5 hours, 32 minutes and 20.379 seconds.


Original Info Wikipedia