Police were notified of the accident at 7.30am on Friday.
Watson said Clark was a keen motorcyclist who enjoyed riding his Yamaha open class sport bike, or superbike, particularly at Highlands Motorsport Park in Cromwell.
She said his caravan had been full of toy cars and motorbikes and half a storage lockup was also full of his toys.
The toys would be donated to Wanaka's National Transport and Toy Museum, she said.
Clark was originally from Auckland but had lived in the Wanaka area for more than 20 years and was working as a landscape gardener.
Police have asked for anyone who may have witnessed a black motorcycle being ridden at excessive speed on Cardrona Valley Rd between Thursday evening and Friday morning to contact the Wanaka police station.