Josh Inglis entertained with a quickfire half-century and injured Joel Paris batted bravely but a spot in the Marsh Sheffield Shield final proved elusive for Western Australia.
Requiring a win to make the decider, WA instead endured a heavy loss as Tasmania beat the home side by 175 runs on Tuesday.
Set an improbable 480 to win, WA had some moments but ultimately finished well short, Cameron Gannon (17) the last batsman out in the final session on day four.
Opener Sam Rainbird was the pick of the Tasmania bowlers with 4-67 while his new-ball partner Jackson Bird took 3-63 including the important wicket of Inglis, who turned heads with his T20-like 54 from 38 balls.
With a daunting run-rate required throughout, veteran Shaun Marsh went at a good clip (54 from 70 balls) but just as the former Test player was looking to put the foot down further he edged Lawrence Neil-Smith (2-47) through to 'keeper Tim Paine.
Sam Whiteman (24), Cameron Green (40) and Mitch Marsh (22) all chipped in, but wickets fell all too regularly as Tasmania's bowlers proved too good with the scoreboard pressure on their side.
Paceman Paris, who injured an adductor on day one and didn't bowl again after claiming two early wickets, fronted in trying circumstances and made a commendable 48.
Beau Webster, who scored 135 not out in the Tigers' first innings and also grabbed 2-32 when WA responded, was player of the match.
WA missed out on what would have been a home final if they had won, while Tasmania finished the season strongly with consecutive victories, including a routing of finalists NSW.
Don't miss The Heat Repeat on Foxtel, coming April 7. The two-part documentary will also be shown on Kayo and cricket.com.au.
