Wikipedia
The Surf Line is a railroad line that runs from San Diego north to Los Angeles along California's Pacific Coast. It is so named because much of the line is near the Pacific Ocean, within less than 100 feet (30 m) in places. The line is owned by the Southern California Regional Rail Authority and San Diego Northern Railway, and hosts Metrolink's Orange County Line and Inland Empire–Orange County Line, the San Diego Coaster, and Amtrak Pacific Surfliner passenger trains. The BNSF Railway operates freight over the line using trackage rights.
Usage examples of "surf line".
He stopped out past the surf line and came to the surface in the middle of a kelp bed, his massive head breaking though strands of kelp like a zombie pickup truck breaking sod as it rises from the grave.
Just above the surf line, long-legged sea birds were tearing at a dead hardalt that had been washed ashore.
After a moment, he realized the glow was thirty or forty meters away - the surf line.
Pitt stood and watched the shore recede until the dock became a dirty speck on the surf line.