Free hyrdoslide rides, gigantic inflatables, movie screenings of Ice Age and Ice Age 2 on Monday and - for those who get in early enough - a free slice of giant birthday cake, given to Lakes Leisure by New World supermarket.
Lakes Leisure chief executive Fiona McKissock said it had been a huge year and the staff were looking forward to the celebrations.
"We'd love everyone to come and join in the fun. We'd really like to thank the community for their support over the past year.
"We have had a few teething problems. However, that's bound to happen to a degree when you open a facility of this size and complexity. I believe we've learned a lot and we're looking forward to making sure the community has the best facility possible to cater to its needs.
"In particular, we're really excited about new developments like the gym - it's another major step forward to ensure maximum use of the Frankton site for fitness and fun," Ms McKissock said.
The $18 million swimming facility in Frankton opened its doors to the public on May 31, 2008, after nearly 11 years of planning, consultation and development.
Since then, about 130,000 swimmers have been through the doors, contributing to more than one million visitors who have visited the Queenstown Events Centre complex since it opened in 1996.
Lakes Leisure facilities manager Cam Sheppard said demand had exceeded his expectations.
"I'm really thrilled to see the number of regulars who keep coming through the doors, and it's great to see how proud people are of Alpine Aqualand.
"We've seen a lot of swim meets, the start of numerous new community programmes, huge demand for our Toddler Time programmes, and we still have a number of other new initiatives in the pipeline."
Lakes Leisure will hold a private event on Thursday to thank key parties involved in the establishment of the aquatic facility.
They include members of the original Pool 2000 Trust, Queenstown Events Centre Trust, Queenstown Lakes District Council, Pool Working Party, Central Lakes Trust, the Community Trust of Southland, and Aurora
