Krohn attended high school at Norwich Free Academy, where he ran cross country and track, never besting his team mate Rob Simalchik, graduated with the class of 1976.
[3] In his senior year, he ran in the mile race at the State LL championships, where coach Fred Dwyer from Manhattan College intended on recruiting Jody Weatherwax, who was the favorite to win the race.
[3] At the time Krohn was recruited to Manhattan College, they were one of the most respected track programs in the United States.
Krohn linked up with coach Mike Barnow at Westchester Track Club, where he trained for various distances.
[5] On July 27, 1985, Krohn ran his lifetime best 5000 meters in Oslo, Norway, in a race which was won by Saïd Aouita.