Los Alamos Old Days 2025. Los alamos old days celebration on the last full weekend of september, as well as other fundraisers throughout the year. On sunday morning, the small town’s parade for the 77th annual old days celebration.
This year marked the 77th year of celebrating the history and people of los alamos with barbecues, dances, an artisan mart, a car show, a parade, and more during the. 1,030 likes · 1,499 talking about this · 4 were here.