East Fife secured the final play-off place in League 2 by beating Elgin City 3-1 at Bayview on Saturday.
Kevin Smith bagged a double for Gary Naysmith's team and Derek Riordan was also on target before Jamie Reid pulled one back.
East Fife will meet Stenhousemuir in the play-offs, while Queen's Park and Arbroath go head to head in the other semi-final.
Arbroath thrashed Berwick 5-0 with goals from Bobby Linn, Simon Murray (2), Thomas Grant and Ricky Little. The visitors had Stephen Tulloch sent off in the closing stages at Gayfield.
Queen's Park were beaten 2-0 by Clyde at Broadwood, with Steven McDougall and Brian McQueen scoring for the Bully Wee.
Champions Albion Rovers signed off in style with a 5-1 victory over East Stirlingshire at Ochilview. Ally Love (2), Mark McGuigan, Michael Dunlop (penalty) and Marc McKenzie scored for Rovers, with David Bates replying for Shire.
There were goals galore at Galabank as Annan edged out Montrose 4-3, helped by a Peter Weatherson double and goals from Junior Ogen and Martin McNiff. Garry Wood and Ross Campbell (2) countered for Montrose, who now face Brora Rangers in a two-legged play-off.