Rangers went a point clear of Glasgow City at the top of the ScottishPower Women’s Premier League, Celtic now on the heels of the second-placed side.
Kirsty Howat volleyed Rangers ahead after only five minutes and they doubled their advantage with a 64th-minute penalty, converted by Katie Wilkinson.
Five minutes later and Celtic also scored from the spot, Saoirse Noonan sparking hopes of a comeback.
Then with three minutes left, Celya Barclais dramatically found the leveller via the post.
Rangers next host Motherwell on Sunday, Glasgow City go to Aberdeen, while Celtic make their Champions League group stage debut on Tuesday 8 October against FC Twente at New Douglas Park.
