Willis is excited to be headlining the event.
"Speedgolf has become a great passion of mine," he told the Rotorua Daily Post.
"It enables me to get out on to the links, for nine or 18 holes, without me being away from home for more than an hour.
"It's also a great workout that complements my running training and helps keep me fit in the off season when I need a mental break from athletics.
"I'm really excited for the New Zealand Speedgolf Open in Rotorua to showcase this great sport to all the talented jack-of-all-trades sports people we have in our country."
Speedgolf is the brainchild of fellow 1500m silver medallist, Steve Scott of the US. It counts the total number of shots combined with the number of minutes taken to complete the course.
Entry into the event costs $95 for two days golf, a souvenir polo shirt, refreshments and the chance to win prizes and give-aways. To enter visit www.golf.co.nz by Friday, February 13.