WESTPORT — Thousands of runners are expected to hit the streets Thursday morning for the annual Thanksgiving Day Race, organized by the Pequot Runners.

Although the race starts and finishes in the Southport section of Fairfield, most of the 5-mile event follows a course through Westport.

Police warn that streets in Westport comprising the route will be temporarily closed, and that as a result, drivers on other area roads should expect delays and congestion most of the morning.

The race is scheduled to start at 8:15 a.m. on Pequot Avenue.

Runners enter Westport via Beachside Avenue, head north on Sasco Creek Road, east on Greens Farms Road, northwest on Clapboard Hill Road, south on Maple Avenue South, back on Greens Farms Road heading west, south on New Creek Road, back onto Beachside Avenue heading east as the race course re-enters Southport toward the Pequot Avenue finish line.

Most of the runners are expected to be clear of the 5-mile course by about 11 a.m., police said.

Drivers are advised to plan alternate routes to avoid traffic problems.