More People Downtown, More of the Time

Los Alamos MainStreet hosts several major community events in downtown Los Alamos. We believe that community-building events lead to better quality of life for the entire community. All events are FREE to the public.

Los Alamos ScienceFest

July 11-15, 2018

ScienceFest features a weekend of interactive activities, competitions, speakers, tours, and exhibits to engage the public in science. Festival Day showcases non-stop interactive science demonstrations, kids activity area, music, food, and performances. Register to participate here.

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Fair & Rodeo Parade

August 10-12, 2018

The Los Alamos County Fair and Rodeo is a 3-day event. Come downtown to enjoy the Arts & Crafts Fair and Rodeo Parade. The Cowboy Dinner & Dance takes place at the Posse Lodge and the Rodeo rides once again at the Brewer Arena, both on North Mesa. Register to participate here.

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October 27-28, 2017

Halloweekend is anchored by Trick-or-Treat on MainStreet, a wildly popular event that turns Central Avenue into a ghoulish pedestrian area. Businesses hand out buckets of candy to trick-or-treaters. Street dance performances, marching bands and a pet costume parade make this event memorable for the whole family. Register to participate here.

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Holiday Lights Parade

December 1-3, 2017

WinterFest Weekend celebrates winter in Los Alamos. A host of businesses and organizations schedule events including ballets, bazaars, shows, and sales. The weekend is highlighted by the Holiday Lights Parade and the lighting of the tree at Ashley Pond. Register to participate here.

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Support the Community by Sponsoring an Event

Join our family of sponsors that are contributing to building the community of Los Alamos.


volunteer_final_1Los Alamos MainStreet is a volunteer driven organization. Following the best practices as established by the National Trust for Historic Preservation, we have standing committees that implement all our projects. We invite you to join our volunteer corps, a wonderful group of individuals, students and community leaders. Meet new friends, try out new skills and have fun as you help support the MainStreet District. Opportunities range from volunteering for specific events to joining one of our Creative District committees.