I've read a few recent posts referring to the "lost coast" in California. Where the heck is this?

It's the bit north of where SR 1 rejoins US 101 and where 101 hits the coast around Eureka. Not really lost, just mislaid, like my car keys.

Don't know, but I can tell you what a meat whistle is.

Also saw this posted recently. Some couple referred to the area around Cambria as the lost coast, which is definitely wrong. John got it right.

lost,
The Lost Coast is the reason that coastal Highway 1 swings inland about 50 miles north of Mendocino. This is an extremely rugged area, with mountains that come straight down to the water and wild, wave-swept beaches. The scenery is truly magnificent but the area is not set up for the casual visitor. The few roads going through are dirt for the most part and not passable in the rainy season. There are a few very small towns where vacationers fly or boat in to their cabins. All in all, if you have a four-wheel drive vehicle, are experienced in backpacking and/or rugged camping, it's worth looking into. If you aren't, be warned that the Lost Coast is definitely not like a trip to Monterey!

A good estimation of the Lost Coast is the stretch of California coast between in the north, Cape Mendocino (In Humboldt County southwest of Ferndale) to in the south, Cape Vizcaino in Mendocino County near Rockport. The Usal road connects highway 1 to the Southern portion. Can access the northern portion through Ferndale or off 101 at Founders Grove or the Shelter Cove road.
There is a 30+ mile stretch from the Matole River's mouth to Shelter Cove where people hike and auto access is next to impossible. This is not a place for beginners.

Have Fun
GP

The Usal road is passable in the summer even with a two-wheel drive car, but it is an adventure. The state park is about 7 miles in from highway 1, has a stream but the water must be boiled. It's a great area if you are used to using Forest Service roads and primitive campsites.