[1] His routes included many climbs in Eldorado Canyon, near Boulder, Colorado, The Diamond on Longs Peak, towers in the desert southwest, and Yosemite National Park, among other locations.

Notable among his first ascents is the Kor-Ingalls Route on Castleton Tower and The Finger of Fate Route up the Fisher Towers' Titan; both routes are recognized in the historic climbing text Fifty Classic Climbs of North America.

[3] Kor received the 2009 American Alpine Club's Robert & Miriam Underhill Award for outstanding climbing achievement.

[4] Kor lived in Kingman, Arizona and continued climbing until his early 70s.

He had kidney failure and prostate cancer at the time of his death.