Tongariro Crossing:  https://fastestknowntime.com/route/tongariro-alpine-crossing

Rakiura Track: https://fastestknowntime.com/route/rakiura-track

Tongariro Northern Circuit: https://fastestknowntime.com/route/tongariro-northern-circuit

Milford track (now second fastest time): https://fastestknowntime.com/route/milford-track

Also Strava and Wildthings for unofficial FKTs and Crowns