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Arcadia Today
By the People, for the People
Derby Day 5K to Reshape Arcadia Streets This Saturday
Annual race through LA County Arboretum closes Baldwin Avenue for 2.5 hours
Published on Mar. 11, 2026
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The Derby Day 5K, a popular annual running event, is set to take place this Saturday, April 4, in Arcadia. The race, which starts at Santa Anita Park and winds through the LA County Arboretum, is expected to draw around 7,500 runners and will result in the closure of Baldwin Avenue between the 210 Freeway and Huntington Drive from 7:30 to 10:00 a.m.
Why it matters
The Derby Day 5K is a major community event that brings runners and spectators to Arcadia each year. The street closures will impact traffic and access to businesses and residences along the race route, so local residents and visitors need to plan accordingly.
The details
The 5K race course starts at Santa Anita Park, home of the famous Santa Anita Derby horse race, and takes runners through the scenic LA County Arboretum before finishing back at the racetrack. The event is supported by the City of Arcadia and USC Arcadia Hospital, and will feature post-race beers and an afternoon of horse racing at Santa Anita.
- The Derby Day 5K will take place on Saturday, April 4, 2026.
- Baldwin Avenue between the 210 Freeway and Huntington Drive will be closed from 7:30 to 10:00 a.m. on race day.
The players
City of Arcadia
The local government that is supporting the Derby Day 5K event.
USC Arcadia Hospital
A major sponsor and supporter of the Derby Day 5K.
Santa Anita Park
The racetrack that hosts the start and finish of the Derby Day 5K.
LA County Arboretum
The scenic park that is part of the Derby Day 5K course.
What’s next
Arcadia residents and visitors should plan ahead for the street closures on race day and expect increased traffic and crowds in the area surrounding Santa Anita Park.
The takeaway
The Derby Day 5K is an annual tradition that showcases Arcadia's vibrant community and commitment to healthy, active lifestyles. While the street closures may cause some temporary inconvenience, the event brings economic benefits and a sense of local pride to the city.
