BOZEMAN – Join the Gallatin Roller Girlz for a double dose of Montana roller derby on Saturday, Aug. 20, at the Gallatin County Fairgrounds’ Haynes Pavilion. GRG’s Mountain Mayhem face off against Butte’s Copper City Queens, followed by the Bozeman Brawlers match up with Helena’s Hel’z Belles.

Explorer, thief, academic, and archaeologist costumes are encouraged for the Indiana Jones-themed event. Costumed attendees aged 18 and older get first dibs on limited trackside seating and will receive a coupon for free ice cream.

This family friendly event features food by Bubby’s, a no-host bar by Bar IX, raffles, games, prizes, and music by DJ Chachi. Aerial Arts of Bozeman will provide halftime entertainment.

A portion of the proceeds from this event will benefit Heroes and Horses, a Bozeman nonprofit that taps into the power of wilderness and horses to help rehabilitate combat veterans during their transition into civilian life.

The nonprofit GRG achieved Women’s Flat Track Derby Association full member status in September 2015. Skaters of the Lost Ark is a sanctioned WFTDA bout, and affects GRG rankings at national and international levels.

Tickets for Skaters of the Lost Ark are available at the door or in advance at and Cactus Records. Kids 10 and under enter for free. Doors open at 5 p.m. and the Mountain Mayhem bout begins at 5:30 p.m., followed by the Bozeman Brawlers match at 7:30 p.m. An after-party will be held at Bar IX.

For more information about women’s flat track roller derby and the Gallatin Roller Girlz check out their Facebook page or visit