Alpine tarns that reflect Mt Sefton and Mt Cook are the reward on the Red Tarns Track, a walk of about two hours in Aoraki/Mt Cook National Park. It starts at the Mt Cook Village Public Shelter on Bowen Drive. The track climbs about 300 metres and is quieter than the Hooker Valley Track, and the website suggests it for sunrise or sunset.
Parking is at the Public Shelter, which has toilets, a shelter with untreated water and a walker's information sign. If the car park is full, the visitor centre is a five-minute walk away. In summer, from November to April, a shuttle runs to Mt Cook Village from Lake Tekapo or Twizel. The website puts the village about 3 hours 10 minutes northeast of Queenstown and 4 hours west of Christchurch.