Highway 1 through Big Sur will close to vehicle traffic on Sunday morning for the Big Sur International Marathon.
Highway traffic will be restricted from 4 a.m. to 1:30 p.m. from Sycamore Canyon Road to Carmel Valley Road. Southbound traffic will be stopped altogether.
The CHP will lead three caravans north during the closure. Delays could reach 2 hours.
The race begins at 7 a.m. in Big Sur and heads north to Carmel.