Georgia Baker took over from Richie Porte, winning a sprint finish to the final-stage criterium of the National Road Series race at Adelaide's Victoria Park.

With runaway leader Sarah Gigante staying safe, Garmin-Australia's national track cycling team members Maeve Plouffe, Annette Edmondson, Ashlee Akundinoff and Lauretta Hanson were all capable of powering to a sprint finish but it was teammate Baker who took the honours.

"We thought we'd make the call whether it would be Nettie (Edmondson) or myself sprinting for the win,'' Baker said.

"I was happy to lead her out at the bottom corner after I got second in stage 2 (at Lobethal).

"She said 'no, no, no, you go for victory' and I'm just so happy I feel so honoured for the track girls to lead me out."

After back-to-back-stage wins, Gigante claimed a deserved overall victory. Victoria's national time trial champion's lead was never in any doubt despite the 41-degree heat.

Gigante had taken permanent ownership of the queen of the mountain jersey at Willunga Hill on Saturday, but the sprint jersey was still up for grabs.

Launceston's Izzy Flint tried to part the peloton before the first sprint but Ruby Roseman-Gannon surged to the top of the classification.

Launceston's Nicole Frain came seventh on the stage to finish fourth overall.

Devonport's Anya Louw was 19^th on the stage to finish 12^th overall.

Baker was 21^st on general classification and Lauren Perry propped up the field in 61^st as fellow Tasmanians Flint and Catelyn Turner failed to finish.