The Mount Iron Track is a popular local hiking trail in Wanaka, t's not too long or difficult, which makes it a great afternoon hike if you want some nice views and a bit of a workout.
Mount Iron is great because you can do it as a loop track or hike up to the peak and come down the same way. There's plenty of room to park your car and it's even walking distance from the city if you don't plan to drive.