Geocentric Athlete
An athlete who pursues outdoor pursuits of geographic significance. Ie: a mountaineer who climbs Everest mountain because it is the highest peak, the sailor who sails around the globe and the seven seas, the Navy Seal who swims across the equator as a special initiation ceremony. These pursuits are consistent of those of the geocentric athlete.
Griff is biking across North America, then sailing the seven seas. He's one hardcore geocentric athlete.