The action began on Saturday morning with the annual rugby 10s tournament at Jack Reid Park.
Arrowtown and Wakatipu were joined by Invercargill teams Woodlands, Marist and Collegiate, with Cromwell, Alexandra, Upper Clutha and Maniototo rounding out the field.
The Southland sides dominated the tournament, finishing first and second, with a plate final between Marist and Collegiate.
Marist won 12-7.
The shield final between Arrowtown and Wakatipu was called off for lack of players, with both teams hit by injuries.
Organiser Richie Anderson said it was the ninth year the 10s tournament had been held and the sweltering 29degC heat at Jack Reid Park shortly after noon was a far cry from last year's weather, when winter arrived in February.
"I dubbed this the man or mice tournament.
You've either got it, or you don't," he said.
Mr Anderson said a crowd of about 300 enjoyed the day's entertainment, which finished about 6pm.
At Lake Hayes, the 18th annual running of the Lake Hayes women's triathlon and duathlon attracted about 140 women.
The triathlon course involved a 300m swim or 2km kayak on Lake Hayes, a 15km bike on the Lake Hayes-Arrowtown Rd into Speargrass Flat Rd and return, then a 5km run/walk on the Lake Hayes track, to finish at the Lake Hayes Pavilion.
The duathlon course comprised a 1.5km run on the Lake Hayes track, a 15km bike and a 5km run to the finish line.
New Zealand Triathlon representative Tanya Dromgool, of Auckland, set a blistering pace in the open triathlon section, recording the fastest time, 53min 01sec, ahead of Josie Cederman, of Queenstown, (58min 27sec) and Jaime Kruijen, also of Queenstown, (1hr 54sec).
Race director Geoff Hunt said the event attracted several women new to the sport, which was "the exciting part about it".
"The camaraderie is a big part of the race and it is also an event where there is no pressure, which is a major part of its appeal."
Fiona Reid, of Wanaka, defended her 2009 title in the veteran triathlon, winning with a time of 58min 53sec, ahead of Sue Mavor, of Arrowtown (1hr 02sec).
Bonnie Gill, of Queenstown, won the individual open duathlon (59min 08sec), just pipping Sally Orr, of Queenstown, (1hr 22sec).
Ann Scanlan, of Wanaka, won the individual veteran duathlon title after finishing second last year.
She had a fast race, to finish in 56min 27sec, ahead of Kirsty Hart (Queenstown) in 1hr 1sec.
Mr Hunt said a draw for a Giant bike, donated by Vertigo Bikes and Fresh Choice, was won by Caroline Lewis, of Queenstown.
"It was well deserved because she has never owned her own bike," Mr Hunt said.
Yesterday morning budding duathletes had their turn to shine, in the Ironkids duathlon, also held at Lake Hayes.
Excess energy was burned off quickly as the children ran and then biked a course which started and finished at the Lake Hayes Pavilion.
Mr Hunt called it a "good weekend all around".
About 160 children aged from 6 to 14 competed.
Jodie Llewellyn (12), not content with finishing ninth in the individual women's triathlon on Saturday, followed up with a successful showing in the Ironkids duathlon.
Although the weather forecast was not good yesterday "it's been a perfect day", Mr Hunt said.
"Lots of mums went away happy [on Saturday] and lots of their kids went away happy [yesterday]," Mr Hunt said.
"Both events went as smoothly as could possibly be.
"There were no hiccups at all."
For full results from the 2010 Lake Hayes Women's Duathlon and Triathlon, visit www.southerntraverse.com
