Several road lanes will be temporarily closed to make way for the 49th annual Marin Century bike race this Saturday, August 6. Two-lane closures are scheduled on the steepest sections of Lucas Valley and Point Reyes-Petaluma roads from 6:30 a.m. to 9 a.m. and 7:30 a.m. to 10 a.m., respectively. Drivers are also urged to keep an eye out for bicycle traffic on Las Gallinas, Nicasio Valley Road, Sir Francis Drake Boulevard, Fairfax-Bolinas Road, Highway One, Chileno Valley Road, Valley Ford Road, Coleman Valley and Joy Roads, Middle Road and Marshall-Petaluma Road.