After a long season and a tough finals series, Eaton will play in this year's South West Football League decider.
Fans headed to Hands Oval for the Boomers' preliminary final showdown with Donnybrook, on Sunday afternoon.
Superstar Jarrod Humphries kicked Eaton's first goal, before teammate Joseph Peter John Bertola booted the team's second from 50 metres out.
In complete control, Humphries posted his second/Eaton's third late in the opening term.
Ahead by 20 points at quarter time, the Boomers ran circles around Donnybrook in the second.
Goals from Karl Collard, Heath Ryder, and Jarrad Fazioli sent Eaton's supporters into a frenzy.
Donnybrook's fans watched in horror, as Ethan Maguire and Graham Jetta extended the Boomers' lead to 52 at half time.
The reigning premiers picked up the pace and made smarter decisions throughout the third term.
Star forward Chris Atthowe took a clean mark and kicked the team's first goal from 35m out.
Ahead by 46 points at three quarter time, the Boomers rubbed salt into Donnybrook's wounds in the fourth term.
Humphries handballed to Brandon Jetta, who then spun around and kicked Eaton's ninth goal for the game.
Donnybrook missed a few crucial attempts on goal, before Bertola booted another goal from the 50m line.
Finding free space up forward, the Dons scored a consolation goal late in the term.
Following Jetta's second, the Boomers celebrated a resounding 11.12 (78) to 2.6 (18) win.
Eaton will return to Hands Oval for next Sunday's blockbuster against Harvey-Brunswick-Leschenault.
South Bunbury will take on Bunbury in the 2019 Colts Grand Final, on September 22.
On Sunday, the Tigers went up against Busselton in their preliminary final at Hands Oval.
After claiming a one-point lead at half time, the home side posted four goals to one in the third term.
Jed Montgomery kicked five goals in the Tigers' 11.6 (72) to 5.10 (40) victory. Busselton's Jack Kennedy and Ky Spowart slotted two goals each.
Harvey-Brunswick-Leschenault fought off a late charge from the Boomers in the Reserves preliminary final.
The Lions secured a seven-point lead at the first change, before kicking three goals to two in the second quarter.
Both sides rallied to kick three goals each in the third term.
Conceding two goals in the fourth, the Lions held on to claim a 9.9 (63) to 9.7 (61) win.
