Spur Trail, Protected trail in San Mateo County, California, United States.

Spur Trail is a paved walking path in Millbrae, San Mateo County, made up of two separate segments. The northern one runs north–south from Richmond Drive past the west side of Taylor Middle School, climbing through oak and eucalyptus groves and open grass to Hillcrest Boulevard. The southern one runs east–west from South Ashton Drive, roughly parallel to Millbrae Creek and Millbrae Avenue, past Mills High School's running track and tennis courts, ending at Magnolia Drive.

Local residents successfully fought in 1975 to protect this area as open space rather than allowing road expansion through it. This decision preserved the green corridor that exists today.

The trail's name comes from the Spur Property, land set aside for a never-built freeway extension. A plot at El Camino Real and Millbrae Avenue became the Hong Kong Flower Lounge in the 1980s, while the rest stayed parkland. Today the paved path passes a YMCA skatepark and tennis courts near Mills High School.

The northern section can be entered from Richmond Drive while the southern section is accessible from South Ashton Drive. Both access points are easy to locate and offer straightforward entry to the paths.

The route runs alongside Millbrae Creek and passes near sports facilities and a skateboard park that most people overlook. This combination of natural landscape and recreation amenities creates an unexpectedly versatile destination.