Ngāti Porou East Coast will host Mid Canterbury in Ruatoria in the Lochore Cup final.
South Canterbury romped to a 76-9 win over King Country, scoring 12 tries without answer with fullback Liuele Simote crossing for three tries and wings Kalavini Leatigaga and No8 Siu Kakala both scoring two tries.
Whanganui faced a tougher contest before beating Thames Valley 25-18 in the second semifinal.
In the Lochore Cup section, Mid Canterbury upset top qualifiers North Otago 31-15 while fourth qualifier Ngāti Porou East Coast headed Horowhenua Kapiti 37-30 with halfback and captain Sam Parkes completing a hat-trick of tries. Wing Louis Northcott completed a hat-trick of tries for Horowhenua Kapiti.
South Canterbury 76 (Kalavini Leatigaga 2, Siu Kakala 2, Tokomaata Fakatava, Liueli Simote 3, Sam Briggs, Zac Saunders, Theo Davidson, Tomasi Cikaca tries; Briggs 8 con) King Country 9 (Quinn Collard 3 pen). HT: 24-9
Whanganui 25 (Lindsay Horrocks, Aleki Vakarorogo, Timosi Serewalu tries; Ethan Robinson 2 con, pen; Dane Whale dropped goal) Thames Valley 18 (Ben Stephens, Sam McCahon tries; Todd Doolan con, 2 pen). HT: 12-11
North Otago 15 (Ratu Logatavu, Mataitini Feke tries; Ben McCarthy con, pen) Mid Canterbury 31 (Raitube Vasurakuta 2, Hunter Stewart, Jonetani Vasurakuta, Nathan McCloy; Tom Reekie 2 con; McCloy con). HT: 12-14
Horowhenua Kapiti 30 (Darren Falaniko, Louis Northcott 3 tries; Kody Edwards 2 con, 2 pen) Ngāti Porou East Coast 37 (Sam Parkes 3, Khian Westrupp, Joe Wadman tries; Carlos Kemp 3 con, 2 pen). HT: 18-22
South Canterbury vs. Whanganui
Saturday 22nd October
Pleasant Point Domain, Pleasant Point. 2.05pm KO
LIVE on SKY Sport
East Coast vs. Mid Canterbury
Sunday 23rd October
Whakarua Park, Ruatoria. 2.05pm KO
LIVE on SKY Sport