Dr. Kathryn “Kathy” Sullivan wanted to take a walk, but this was no walk around the block. She wanted to take a 140-mile walk. Let me explain. Kathy’s brother Grant had heard about the planned walk, had applied to be a participant, and encouraged Kathy to apply as well. She was uninterested at first because she wanted to take a seven-mile swim in the Pacific Ocean instead. Kathy disregarded Grant’s suggestion until she saw an advertisement for the upcoming walk in a scientific magazine. Shortly after she applied for the walk, William Ryan of Columbia University offered Kathy the chance to take the seven-mile swim that she had been dreaming of for years. William and Kathy discussed the walk and the swim, and they concluded that Kathy should wait to hear if her application to take the walk was accepted. Williams reassured Kathy that she would have another opportunity to take the swim but the opportunity to take the walk would probably never happen again. Kathy’s wait was worth it. She was invited for a week of interviews, psychological examinations, and physical examinations. Of the large group who were chosen, Kathy was one of six females selected. Grant, Kathy’s brother who had encouraged her to apply, was not selected.
The magazine advertisement I mentioned earlier said women could apply, but many scientists believed that women would be unable to complete such a walk because they were inferior to men. Scientists believed women would require more specialized equipment than men to complete such a walk. Of course, those scientists were mostly men. Kathy was fitted with a special pressurized suit which provided oxygen and blocked out the Sun’s rays. Kathy spent years training for the 140-mile walk which would last just a few hours. On October 11, 1984, 33-year-old Kathy dressed carefully in her specialized clothing which weighed more than she did. Then, she stepped out of the vehicle and began her walk. There were no trees, no sidewalks, nor automobiles on her route. Despite the initial doubts of scientists, she completed the walk without any trouble at all. Kathy made history.
Kathy still wanted to take that seven-mile swim, but it took longer than she had imagined. 36 years after Kathy completed her walk, she finally got the opportunity to take that swim in the Pacific Ocean. Just as she had for her walk, Kathy prepared well and used specialized equipment. On June 8, 2020, sixty-eight-year-old Kathy finally fulfilled her dream and completed the swim that she had dreamed of for decades.
Kathy does not consider herself an adrenaline junkie, but a scientist and explorer. You see, the 140 miles I mentioned was not the distance she traveled on her walk, but the height above the Earth she was when she took her walk. On October 11, 1984, Kathryn Sullivan became the first American woman to take a walk…a spacewalk 140 miles up in space. On June 8, 2020, she became the first woman to swim, well… descend, in a submersible to Challenger Deep in the Mariana Trench, the deepest known point in Earth’s oceans. Kathy is the only woman known to have both walked in space and visited Challenger Deep.
Featured image: Walking path at Lincoln Parish Park, Louisiana.
Sources:
- Colin Dwyer, “1st U.S. Woman To Walk In Space Dives To Deepest Point In The Ocean,” NPR, June 9, 2020, accessed September 27, 2026, https://www.npr.org/2020/06/09/873194201/first-u-s-woman-to-walk-in-space-dives-to-deepest-point-in-the-ocean.
- Mark Kahn, “Kathryn D. Sullivan: From Outer Space to Under the Sea,” September 17, 2022, accessed September 27, 2026, https://airandspace.si.edu/stories/editorial/kathryn-sullivan-outer-space-under-sea.
- “The New Space Age with Kathryn Sullivan,” University of Alaska Anchorage, accessed September 27, 2026, https://www.uaa.alaska.edu/academics/college-of-arts-and-sciences/cas-community-lecture-series/sullivan.cshtml.
© 2026 Brad Dison. All rights reserved.
