More than 6000 people voted in the competition.
Mr List said Whakarewarewa Forest was a favourite spot of his to ride. "I am really delighted to be here today. When I heard Rotorua had won the award I was so excited."
More than half a million hours of man power had gone into the creation of the trails in the forest, he said.
Multi-day Adventures owner Tak Mutu said the forest had a great reputation with professional riders internationally.
"It's another accolade that's deserved. The award is not a surprise. It's easier to sell Rotorua as a mountain biking destination because it's the truth."