WESTPORT — Riders participating in the annual CT Challenge bicycle fundraiser will pass through parts of Westport for several hours Saturday, according to a police traffic advisory.

Several routes of the Fairfield-based event, which raises money to support cancer survivors, include local streets, primarily in the eastern sections of town.

The shorter cycling routes enter Westport in the area of Beachside Avenue, while longer routes enter town on Long Lots Road, police said.

To check all of the streets affected by the event, click here.

Starting times are staggered for participants taking different routes, but the heaviest volume  of bicycle traffic is expected to be between 7 and 10 a.m. Saturday, according to the advisory.

Motorists are advised to expect periodic congestion, and to drive with caution.