The Weekender and Public Transport Authority have 20 family passes for the first ride to give away.
Each will also allow a group of up to seven people free travel on any TransPerth services for the day.
To enter, tell us how long the Butler rail extension is and send your name, email address and daytime phone number to Butler Station Giveaway, PO Box 885, Joondalup WA 6919 or email weekender@communitynews.com.au.
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