Colin O'Brady Becomes the First Person to Cross Antarctica Solo

Colin O'Brady began his trek at the Ronne Ice Shelf, traveled from there to the South Pole, and then crossed to the Ross Ice Shelf, he said. He documented much of the trip on his Instagram page, even as he fought fierce wind storms, subzero temperatures and whiteout conditions. To complete the trip, he needed to cross several mountainous areas and travel over miles of sastrugi, which are hard wavelike ridges in the snow and ice formed by wind.

American endurance athlete Colin O'Brady became the first person to cross Antarctica solo without help after 54 days traversing the barren, frigid continent, he said in an Instagram post.

O'Brady revealed Wednesday that he covered the final 80 miles in one continuous push to the finish line that lasted more than 32 hours.  
“finish line!!! I did it!" he wrote.

A wooden post in the background of the photo O'Brady shared on Instagram, he said, is the edge of the Ross Ice Shelf, which marked the end of his trip.

"As I pulled my sled over this invisible line, I accomplished my goal: to become the first person in history to traverse the continent of Antarctica coast to coast solo, unsupported and unaided," he wrote.

"While the last 32 hours were some of the most challenging hours of my life, they have quite honestly been some of the best moments I have ever experienced. I was locked in a deep flow state the entire time, equally focused on the end goal, while allowing my mind to recount the profound lessons of this journey."