Bunbury jockey Kate Witten represents WA in the penultimate leg of the National Apprentice Series at Alice Springs this afternoon.

Witten picks up the mount on the George Cooke-trained Threelegsagain who is rated one of the outsiders in the 11 horse line up.

The son of Danbird will need to lift on current performances after going unplaced in all three starts this preparation.

A win for Witten for elevate Western Australian from fourth position to the top of the National Apprentice Series.

Victoria holds the lead with 17 points, one clear of South Australia and two ahead of Tasmania.

Western Australia is one point ahead of Queensland with the Northern Territory bringing up the rear on four points.

Joe Azzopardi will represent WA in the final leg of the National Apprentice Series at Gawler on Thursday.

The National Apprentice Series is race seven on the Alice Springs Cup programme.