The events below are all child friendly in some way. Some are possible for children to do, some allow prams, some will allow you to take a baby in a carrier. It is important to check with the organisers before entering an event that you and your children will be allowed to participate as rules often change!
January:
Super Seven Series - 7 or 3km options walk or running series once a week for seven weeks. Prams and children allowed.
April:
Great Forest Events Waitarere - 5km, 10km, 21km or 42km run or walk options. Children and prams allowed. Terrain is forestry roads so a good offroad pram is preferable and it can be quite bumpy. Also note it is pretty much impossible to run with a pram as it is a busy event and you can't get around people.
May:
Wellington City Safari - great family event. 3 and 6 hour options in Wellington City. It's a rogaine so you get a map and have to get to as many points as possible in whatever order you choose within the time limit. This rogaine includes use of public transport including buses, trains, the ferry and the cable car. Great fun with older children. Works well with a child in a carrier and would be possible with a pram if you don't mind lugging it on and off buses and avoiding the more offroad areas.
Manawatu Gorge Track and Tunnel Walk - a yearly walk along the rail track side of the manawatu gorge. Children have to be over 10 to participate. May allow babies in carriers if you check but definately not pram suitable!
November:
Rimutaka Rail Trail Fun Run and Walk - 7km, 14km or 21km options run or walk. Very good track and easily suitable for prams and all ages.