"original path" is correct and usable in written English.
You can use it to refer to the route or course of action one started with or had planned. For example, "John had to return to his original path after his detour was blocked by a fallen tree."
This section of the highway was originally built in the 1960s as the Cumberland Thruway, a bypass to the original path of U.S. Route 40 through Cumberland.
The original path of the transcontinental railroad still serves as one of Wyoming's major transportation corridors.
There is an intriguing hint near the end of a more surreal, original path Mr. Harbison might have taken through this familiar material.
The particle continues to circle about the field line, but its forward motion is retarded until it is stopped and finally forced back along its original path.
In a sense they will have to become post-Islamist to chart an original path that combines faith with democratic inclusiveness.
In 1864, a parks report found that the original path around the reservoir was "not agreeable to pedestrians" because it was covered with broken stone.
Jo Greenland, Tours, France The route that Chaucer's pilgrims walked to Canterbury is now occupied by the A2 so you need to deviate from the original path.
The direction of the force is perpendicular both to the direction of motion of the particle and to the magnetic field, so that the particle is deflected from its original path.
But now that RoxXxan is signed to Polydor, how far will she be diverted from her original path of no-holds-barred rhyme-spitting over rivetingly raw and sparse beats, and pushed in a more sheeny, commercial direction?
The corporate world is full of companies that managed to reverse their fortunes by changing their product or purpose when they sensed their original path had run its course.
If this plant becomes fully operational again, it's bad news – the North resurrects its original path to nuclear weapons with a facility able to produce one bomb's worth of plutonium a year.
