Lilac City is a member of the Women's Flat Track Derby Association (WFTDA).

[2] The league was accepted into the Women's Flat Track Derby Association Apprentice Program in July 2010,[3] and became a full member of the WFTDA in March 2012.

[4] In 2013 Lilac City Roller Girls relocated their practice facility to a rented warehouse in Airway Heights, and began holding their bouts at the Spokane Fairgrounds, and the Spokane Convention Center for larger events.

[5] Their all-women's team dropped the gap-toothed princess and re-branded as the Spokane Sass.

The league includes a Men's Roller Derby Association (MRDA) apprentice Sass men's team, the Abominations, and a new Sass junior team, the Wendigo.