In 1965, Enersen made the first ascent of the
Trollveggen mountain in
Romsdalen, Norway, along with Leif Normann Petterson, Odd Eliassen and Jon Teigland. He was one of the founders of the Association of Norwegian nature photographers (Norske naturfotografer) in 1976, and the first leader of the organisation. In 2000, he published a novel in the fantasy genre, titled
Dragen som elsket meg ("The dragon that loved me"). Enersen published and maintained
Who Named It?, a large online dictionary of
medical eponyms. Enersen died in
Oslo on 1 January 2024, at the age of 80. ==See also==