The most family members to complete an ultra marathon is 7 and was achieved by the Pieroni family (USA) at the Nashville Ultra Marathon in Nashville, Tennessee, USA, on 2 November 2013.

Patriarch Dan Pieroni headed up the attempt by his four children, Christina, Julie, Amy and Andrew, and two of his grandchildren, Ashley and Courtney. The family members completed the course in the following times: Andrew – 7:02:40, Christina – 7:33:58, Julie – 7:33:58, Ashley – 7:57:37, Amy – 7:58:24, Courtney – 9:31:58, Dan – 9:33:58.