The Haast Pass-Makarora Road is an excellent day trip. It is the part of State Highway 6 that follows the west side of Lake Hāwea, then cuts over the Ithmus to follow Lake Wānaka to Makarora and Haast Pass. The views along the lakes, backed by mountains, are superb. There are multiple safe places to stop.
In addition, there are many waterfalls. Some are well-known, such as Fantail Falls and Thunder Creek Falls, but others take some effort to find, including the astounding Wilson Creek. Walking is also an option, from the easy and popular Blue Pools Track to tramps such as the Isthmus Track and Brewster Track. You can also camp at Boundary Creek and Cameron Flat.
At the top of Haast Pass, you are between the Mkarrora and Haast River valleys. You can also take the Bridle Track back towards Makaror and part of the original route or hike to a viewpoint. Continue on a bit further to the spectacular Haast Gorge and rapids of the Gates of Haast.