Peter Grandiek rode 111km from Mossburn to the Ascot Park Hotel, in Invercargill, in an effort to raise funds for the Cancer Society.
Mr Grandiek has been doing charity rides for his birthday for the past nine years.
He said the charity rides were not about him — it was his way of highlighting the important work the organisations he supported did in the community.
"It is just another day. I think birthdays are really important when you are young ... you get more excitement out of it. So that is my way to keep the excitement — helping these charities."
Mr Grandiek had the support of three experienced bike riders on his journey — Cycling Southland life member Ray Robinson and his two sons David and James.
The group completed the ride in three hours and 32 minutes.
Even Mr Grandiek was surprised with the effort, as he was predicting a five-hour ride.
"We did pretty well and it was a nice ride. The weather wasn’t too bad and I had three good supporting riders.
"Ray Robinson was one of them and if you ride with him, there is no sightseeing or loitering. If he gets on a bike, you need to ride," he said, laughing.
Mr Grandiek said the average speed of the group was 32kmh and after the long journey he went to celebrate his birthday at a dinner with his family.
"I had no problem this time. I was good as gold," he said.
The experienced biker hoped to be able to help the Cancer Society with funds raised from the longest distance he had ever achieved. However, he did not know what his next challenge would be.
"I am a big fan of having goals but still need to think about which will be the next one. It will need to be something different. Probably on a bike, but different," he said.
Although Mr Grandiek had completed his journey, he was still raising funds for the Cancer Society. He had already raised more than $2000.
"I really wanted to thank everyone who contributed. This is the reason I am here."
