Wagga City are looking to win their fourth title in the last seven seasons after being the first team through to the grand final.
The minor premiers proved far too strong for South Wagga at Robertson Oval on Sunday, taking a 145-run victory.
Jon Nicoll led the way with an unbeaten 149 as Wagga City set South Wagga a mammoth 345 to win off just 63 overs.
The Blues fell well short to be bowled out for 199.
Wagga City are no strangers to success, but this time are the first team through to the grand final.
Captain Josh Thompson was thrilled by the performance.
"I was very stoked with the way the boys played on the weekend," Thompson said.
"We played a full-team performance."
Once again Nicoll shone, coming in following the loss of a couple of quick wickets.
The South Wagga attack, who has struggled to bowl teams out this season, had Wagga City at 3-64 before Nicoll and Ben Turner combined for a 80-run stand.
Mitch Sykes was able to remove the young wicketkeeper for 46 but that only brought Aaron Maxwell to the crease.
Maxwell made 53 before becoming Joel Robinson's second victim as the Blues coach ended the 135-run partnership.
Wagga City then played out the maximum 97 overs they could bat finishing at 6-344 and setting the Blues a monster chase.
They struggled in reply despite 50 from Nathanael Mooney and 46 from former Cats captain Warren Clunes.
Rob Nicoll claimed 3-36 off 5.3 overs plus claimed one of the three runs outs.
Thompson thought the Cats' effort in the field only added the pressure on the Blues.
"We took three run outs and that changed the game, especially Jon Nicoll had a direct hit to run Joel Robinson out," he said. "If he had of missed who knows what Joel would have done."
The Cats have come along way after failing to make the finals last season.
Wagga City only lost once on the way to the minor premiership and are now through to the grand final in the most emphatic fashion.
While a draw would have been enough to progress, courtesy of their higher ladder position, bowling the Blues out only added to Thompson's joy.
"To bowl them out after making 344 off 97 overs is outstanding," he said.
"I'm very happy with how the boys played and really looking forward to the next couple of weeks."
South Wagga will need to regroup against Kooringal Colts if they are to make their fifth grand final in the last six seasons.