Dozens of SF roads closed Sunday for annual half-marathon

Runners reach the finish line at Civic Center Plaza during last year’s half marathon in San Francisco. The 2017 race closed major roads Sunday in the city as thousands of runners took to the streets. Runners reach the finish line at Civic Center Plaza during last year’s half marathon in San Francisco. The 2017 race closed major roads Sunday in the city as thousands of runners took to the streets. Photo: Brittany Murphy, The Chronicle Buy photo Photo: Brittany Murphy, The Chronicle Image 1 of / 13 Caption Close Dozens of SF roads closed Sunday for annual half-marathon 1 / 13 Back to Gallery

A number of major San Francisco streets, as well as two northbound lanes of the Golden Gate Bridge, were closed early Sunday, causing traffic complications as thousands of runners pounded the pavement in an annual half-marathon.

Many of the streets along the route — starting in Golden Gate Park near 36th Avenue and finishing at Civic Center Plaza near City Hall — were shut down several hours before the United Airlines Rock ‘n’ Roll Half Marathon’s 6:15 a.m. start time, according to race organizers.

From its start in the Outer Richmond, the race route winds north through the Presidio and over the Golden Gate Bridge to Vista Point before doubling back along the Marina, then heading south on Polk Street for the home stretch to the Civic Center finish line.

Highway 101 from Lincoln Boulevard over the bridge to Vista Point was partially closed starting at 5:30 a.m. and set to reopen by 9 a.m.

Northbound Polk Street from Bay to Ellis Street was scheduled to be closed until 11:30 a.m.

Here are a full list of road closures, and here is a map of the route.

Parking was also expected to be limited along the route until after the race concludes around 11 a.m.

Michael Bodley is a San Francisco Chronicle staff writer. Email: mbodley@sfchronicle.com. Twitter: @michael_bodley