The Whangaparapara - Old Mill Track is a 2 mi looped trail that starts and ends in Great Barrier Island, New Zealand. Based on our data, the trail is graded as Difficult. For information on how we grade trails, please click here. Also, check our latest community posts for trail updates.This trail can be completed in approx 1 hrs 19 mins. Caution is advised on trail times as this depends on multiple variables. For more info, click here.Hut booking required on this trail, please visit here for more information.)Photo Credit :Fenella ChristianDepartment of Conservation (NZ)