After decades of cycling in several countries, they still love the rush of wind in their face, being close to the land and hearing the birds.
They cycle nearly 5000km a year in various countries, on holiday, and prefer smaller back roads, far from main highways.
They also revel in the ''great people'', including friendly farmers, they meet on gravel roads and in remote spots.
''The people are so good,'' Mrs Butters adds.
''Class and age and income matters less than it matters in everyday life,'' he says.
Mr Butters, a retired lawyer who will turn 80 within weeks, says he and his wife have built up a network of friends in New Zealand.
They have cycled from Cape Reinga to Bluff, but are drawn back to familiar roads in Otago and the Catlins.
They returned to Dunedin this week, and have now headed to Central Otago.
Their many trips include the 150km-long Otago Central Rail Trail, several times; the Nevis Valley and its many river crossings; and Mavora Lakes to Mossburn.
Through a chance encounter with Russell Hurring, six times former winner of the Kepler Challenge, about 25 years ago, the Butters also met St John paramedic and Otago Regional Rescue Helicopter crew chief Doug Flett and his family and have since become friends, seeing each other every year.
The Butters live in Moray Pl, in the Scottish capital, Edinburgh, and enjoy the similar street names in the Edinburgh of the South.
Some big cycling trips have included from Florida in the US southeast to Canada in the north, but they undertook them over many weeks.
Now they often travel only about 50km a day.
They rarely stay in hotels, preferring camping grounds, youth hostels, farm stays, and their tent.
Passing motorists often misunderstood the couple's love of cycling.
''The people in cars think we're in great pain and hating it,'' he said.
''You might have the wind against you, and you might have the rain in your face, but you don't hate it.''
