Tarawera 100 Mile Endurance Run : Official. Kia ora, welcome to New Zealand’s ultimate endurance challenge. Feb. 10-11 2018. A tour of 8 lakes in Rotorua NZ. Join us for this epic 100% Pure New Zealand adventure! The largest and most diverse trail ultra in NZ’s history. Nearly 2000 runners from 50+ countries will be competing in the Tarawera Ultramarathon race week.