From Wiktionary, the free dictionary
From ultra- + distance.
ultradistance (plural ultradistances)
- A very great distance.
2015 July 6, “Changes in Serum Levels of Myokines and Wnt-Antagonists after an Ultramarathon Race”, in PLOS ONE[1], →DOI:Transiently suppressed bone formation and increased bone resorption after participation in a 246-km ultradistance race has been demonstrated.
