Chicagoan’s Who Have Completed the Grand Slam*
June 23, 2019 Grand Slam Completed
What is the Explorer’s Grand Slam?
The Explorers Grand Slam or Adventurers Grand Slam is an adventurers challenge to reach the North Pole, the South Pole and all of the Seven Summits. The Seven Summits are defined as the highest mountain peaks of each of the seven continents.