The Palm Beach Inlet, also known as the Lake Worth Inlet is an artificial cut through a barrier island connecting the northern part of the Lake Worth Lagoon in Palm Beach County, Florida with the Atlantic Ocean.
In 1866 travelers reported that fresh water was pouring out of the lake into the ocean at a point about ten miles south of the Jupiter Inlet.
By 1886 the inlet had migrated about a mile south of the Black Rocks, and closed up during a storm.
In 1893 Henry Flagler, who would complete construction of his Florida East Coast Railway to West Palm Beach in 1894, had the inlet enlarged.
A community of fishermen from the Bahamas had settled on the barrier island just north of the Black Rocks, and they periodically cleared the channel when it silted up.
The federal government assumed responsibility for the inlet in 1935, and continued to widen and deepen it and build up the jetties.