I’ve never done Highway One in the summer, so I’ve never seen it the way most people do—choked with tourists and traffic. I prefer to see the coast highway in the winter, where the only teeming hordes to contend with are those of the pinniped variety.
The elephant seal breeding ground on the Big Sur coast is worth pretty much any detour at this time of year. Be warned, though: don’t have too many other things on your agenda that day. Because you’re going to be so fascinated (and a little freaked out) by the spectacle before you that you’re going to want to throw your plans out the window and stay all day.