Doctor Richard Deming has led cancer survivors up mountains, across oceans, and on a non-stop bike ride across the U.S.
He says those were just warm-ups compared to his next adventure.
On Tuesday, Deming and adventurer Charlie Wittmack will announce the details of their next challenge for the Above and Beyond Cancer initiative.
The pair promises this will be the largest event yet.
Last year Deming led a team on the Race Across America, a non-stop bicycle race from coast to coast. He has also taken cancer survivors up Mount Kilimanjaro and Mount Everest.