She already swam from Cuba to Florida ... and now super athlete Diana Nyad tells TMZ Sports she has a brand new goal -- she wants to pull a Forrest Gump and trek across the USA by foot!!
Nyad was out in L.A. on Monday where she's getting ready to celebrate the 1 year anniversary of her historic swim -- when she told us all about her big plans.
"I just decided ... two years from now, I'm going to walk across America ... and get 1 million people to do it with me!"
And what's her motivation? Diana says she wants to whip America's fat asses into shape!!!
Check out the clip!
Waiting for your permission to load the comments.