Lachlan Stuart is raising money for the Mental Awareness Foundation by running a marathon a day in every state in America.

That's 58 marathons in 58 days.

Lachlan Stuart told Peter Fegan on 4BC Breakfast, "I've never regretted getting out there and getting it done."

"After every run that I've completed, I feel very satisfied and it's the same day time, it feels like Groundhog Day," Mr Stuart continued.

See omnystudio.com/listener for privacy information.