"When I went down there, I knew I had a shot at one or two of the records," 62-year-old Brent Weigner, a retired middle school geography teacher who has run 185 marathons throughout his life, said.
But the last marathon, through Antarctica, ensured he would be the only person in the world who had run seven marathons on all seven continents seven times.
That's 49 in total. He's also, officially, the oldest person to run an ultramarathon in Antarctica.
That determination is amazing in and of itself. But to understand where Weigner has come from is essential in understanding how far he's come.
At age 12, he was diagnosed with lymphoma.
"I was terminal. They gave me six months to a year to live. And estimated my chance of recovery was one percent," Weigner said.
But he survived, only to have the cancer return more than 10 years later. He beat that cancer, and would later get skin cancer. Again, Weigner managed to fight it - and win.
"Some of my buddies will say it's because I'm a three-time cancer survivor that I'm trying to outrun the grim reaper," Weigner said, laughing.
That's not quite it, Weigner insists. He just runs; it's what he does.
He considers each day to be a blessing and doesn't take anything for granted, he says. And as long as he can, he'll keep running.
"People ask me what's my favorite race," Weigner said. "You know what I tell 'em? 'The next one.'"
(KUSA-TV © 2011 Multimedia Holdings Corporation)