When Mr Topp was found, around noon, it took more than 20 people two hours to carry his body 150m back to where he had left his bike. It was believed that he had slipped on rocks and fallen about 10 metres.
It was only in daylight, when searchers pushed up a stream, that one of them spotted a small black cattle dog, which led them a short distance to the body.
Senior Sergeant Cliff Metcalfe, officer in charge of police SAR, said Mr Topp must have been extremely fit to get there.
It was an unfortunate outcome, he added, but the searchers were pleased to find him and return him to his family.
The team had had great support from the community, locals providing vehicles, food and hot drinks throughout the night. Kaeo and Kerikeri volunteer firefighters assisted in the search, and provided a thermal imaging camera.