"lone path" is a correct and usable phrase in written English.
You could use it to describe a single road or pathway that appears isolated and is not often traveled. For example, "The weary traveler followed the lone path, hoping to find some rest."
Toyota, the world's third-biggest automaker, has long trodden a lone path, preferring not to get into alliances with others.
The lone path of the Ohio governor, John Kasich, to the nomination is to extend the race until the party's national convention in July.
The education system is geared toward standardised tests, requiring hours of after-school work, which are considered by many to be the lone path to upward mobility.When children do seek a diversion in sport, many find it on the basketball court.
It's the first study to look at whether organisms as disparate as butterflies, birds, plants, and rodents can all use the same, lone path between two pieces of suitable habitat.
A lone legislative path thus would add instability to the United States' foreign relations.
That doesn't leave Warren with the lone wolf path that may have existed 20 years ago.
Peggy's gone the lone heroine route in her careerist path, and done well, but has just bumped her head against a glass ceiling.
In News Focus, Robert Service writes about a relatively new scientific discipline (or, if you prefer, a new science career path): lone investigators, like Stanford University's Atul Butte, who do "dry lab" biology working on big-data problems with publically available data.
A second work follows a lone woman along the same path reversed, as she ascends from waves toward otherworldly light.
A weirdly dangerous episode for a picture book, but in it I see a hint of the lone citizen standing in the path of the tank.
