Great Walks of New Zealand
Water
Hydration is key on the track and ensuring you are carrying enough water to tackle those climbs is essential. You will ideally need to carry 2 to 3 liters of water per day. Generally, you can refill at most huts and some shelters but not always if there hasn't been a lot of rain, so check the track in advance. Depending on the Great Walk selected you may be able to fill up at fast flowing rivers/creeks along the way.
Water Essentials
Hydration Bladders
Hydration bladders are the easiest way to carry your water and most packs have a section in your hiking pack to store the bladder. A 2L or 3L capacity bladder is sufficient for a Great Walk. The best hydration bladders don't leak or make the water taste funky due the bladder materials used. Make sure to choose a bladder that opens up completely for easy cleaning and drying or your bladder will get mouldy.
Water Safety
Water in the huts is untreated rainwater. Many hikers drink the water without treating it but to be safe there are many options to treat the water.
Boiling water - is time consuming and you will have to wait for water to cool down before storing in bladders.
UV pens - are a little expensive but useful if you hike regularly. Sometimes it is hard to tell if the UV pen cycle has worked.
Water Filters - attachments or Life Straws are a popular option for hikers to carry that can purify water before drinking.
Water Tablets - easy and inexpensive but you need to wait 30 mins before drinking. So, fill up before breakfast and throw a tablet or two in so it is ready for the day.
Water Bottles
Many hikers carry a water bottle as well as a bladder. It allows you to add electrolytes and keep some fresh water for cooking. There are some water bottles that have built in UV pens or filters to treat the water and help make it safer to drink.