Question: how long do lord of the rings elves live?
Answer: Elrond (who was 50% Elven) lived well over 6,000 years before departing Middle-Earth. Because of his distant Elven lineage Aragorn lived over 200 years before he died. As a 3/4 elf Arwen was immortal and lived for 2901 years before dying of grief (after the death of Aragon).