In 1983, Breashears transmitted the first live television pictures from the summit of Mount Everest, and in 1985 became the first American to reach the summit of Mount Everest twice.

In the spring of 1996, Breashears co-directed and co-produced the first IMAX film shot on Mount Everest. When the now infamous blizzard of May 10, 1996 hit Mount Everest, killing eight climbers, Expedition Leader Breashears and his team were in the midst of making this historic film. In the tragedy that soon followed, Breashears and his team stopped filming to provide assistance to the stricken climbers. After returning to Base Camp, Breashears and his team then regrouped and reached the summit of the mountain on May 23, 1996, achieving their goal of becoming the first to record IMAX film images at Earth's highest point. Breashears has said that if there is a lesson to be learned from the May 1996 tragedy, it is that for him, success that year was not to be found in reaching the summit, it was that everyone on his team returned safely. The film, titled EVEREST, premiered in March 1998.