The Los Alamos Derby Dames will take on visiting team High Altitude Hard Roller Derby from Flagstaff, Ariz. for the first home game of the season at 7 p.m. Saturday, May 20. There will also be a Juniors’ Round Robin Tournament starting at noon. In case of poor weather, games will be held at the Los Alamos Middle School and the change of venue will be announced on social media.