Los Alamitos’ civic Christmas tree lighting at St. Isidore Historical Plaza — a small community evening at the city’s historic plaza with the official lighting and family activities.

The City of Los Alamitos runs its Annual Christmas Tree Lighting at St. Isidore Historical Plaza, the city’s namesake historic site at the corner of Reagan Street and Pine Avenue. The plaza’s history — the site is named for the patron saint of farmers and dates to the city’s agricultural early years — makes the setting itself part of the appeal.
The evening runs from 4:00 PM to 7:30 PM, with the official tree lighting during the early-evening program. The event is deliberately community-scaled for a small city: the plaza, the lighting itself, family activities, and the historical context all rolled into one civic moment.
For families in Los Alamitos, Rossmoor, and the surrounding north OC border-area communities, this is the season’s official opening — distinct from larger neighboring city events and quietly anchored in the city’s own history.
At the corner of Reagan Street and Pine Avenue (10961 Reagan St) in Los Alamitos — the city’s namesake historical plaza, a short walk from the city’s small-town center.
From 4:00 PM to 7:30 PM, with the tree lighting during the early-evening program.
Yes — the event is free and open to the community.
The plaza is named for St. Isidore, the patron saint of farmers, and honors Los Alamitos’ agricultural origins. The plaza itself has historical markers and a small-town civic feel.
Along Reagan Street and the surrounding side streets near the plaza. Limited parking is right at the plaza itself; small-city walk-in distances are easy.

St. Isidore Historical Plaza stands at the corner of Reagan Street and Pine Avenue in Los Alamitos — the city’s namesake historic civic plaza. The plaza is named for St. Isidore, the patron saint of farmers, in honor of the city’s agricultural origins; historical markers around the plaza tell that story. Los Alamitos itself is a small north OC city of about 11,500, set against the Joint Forces Training Base and bordering Long Beach and Seal Beach.
Southern California’s holiday lights and festive outings are pure magic — but nothing compares to Santa Claus himself stepping through your own front door. House of Kringle brings a real-bearded, professionally trained Santa to homes and gatherings across SoCal for an intimate live visit your family will treasure for years.