This Saturday, July 15, Portland, Oregon's Rose City Rollers trek on up to Seattle to take on the Rat City Rollergirls in what is sure to be a fantastic night of derby. This interleague contest comes with a twist: it's not just all-stars or travelling teams. They're bringing all the girls to the yard. Each league has four teams and the teams will bout each other rank order. Sweet. More info here, here, and here.