Stevens was born in rural Maine, near West Gardiner to John Stevens, a tanner and farmer, and Harriet Leslie French.
He attended Maine State Normal School (now the University of Maine at Farmington) for two years.
At the conclusion of his schooling in 1873, bleak economic conditions held little promise of a job, and he chose to go west.
Entry into the field of civil engineering evolved from his experience in the Minneapolis city engineer's office.
For two years he carried out a variety of engineering tasks, including surveying and building railroads, and at the same time gained experience and an understanding of the subject.
He became a practical engineer, self-taught and driven by a self-described "bull-dog tenacity of purpose."
In 1878 Stevens married Harriet T. O'Brien.
They had five children, two of whom died in infancy.

By the age of 33, in 1886, Stevens was principal assistant engineer for the Duluth, South Shore and Atlantic Railway, and in charge of building the line from Duluth, Minnesota to Sault Ste.
Marie, Michigan, across the Upper Peninsula of Michigan.
Although a large part of his work involved surveying, he assisted in all phases of railroading: reconnaissance, locating, organizing, and construction.

In 1889, Stevens was hired by James J. Hill as a locating engineer for the Great Northern Railway.

Stevens earned acclaim in 1889 when he explored Marias Pass, Montana, and determined its practicability for a railroad.
Stevens was an efficient administrator with remarkable technical skills and imagination.
He discovered a pass through the Cascade Mountains that bears his name, set railroad construction standards in the Mesabi Range of northern Minnesota, and supervised construction of the Oregon Trunk Line.
 Hill promoted him to chief engineer in 1895, and later to general manager.
During his time at the Great Northern, Stevens built over a thousand miles of railroad, including the original Cascade Tunnel.

 Stevens Pass in the Cascade Range was named for him. (
Most other Pacific Northwest landmarks with the word "Stevens" are named after Isaac Stevens, who is of no relation.)
Stevens was born in rural Maine, near West Gardiner to John Stevens, a tanner and farmer, and Harriet Leslie French. He attended Maine State Normal School (now the University of Maine at Farmington) for two years. At the conclusion of his schooling in 1873, bleak economic conditions held little promise of a job, and he chose to go west. Entry into the field of civil engineering evolved from his experience in the Minneapolis city engineer's office. For two years he carried out a variety of engineering tasks, including surveying and building railroads, and at the same time gained experience and an understanding of the subject. He became a practical engineer, self-taught and driven by a self-described "bull-dog tenacity of purpose." In 1878 Stevens married Harriet T. O'Brien. They had five children, two of whom died in infancy.
By the age of 33, in 1886, Stevens was principal assistant engineer for the Duluth, South Shore and Atlantic Railway, and in charge of building the line from Duluth, Minnesota to Sault Ste. Marie, Michigan, across the Upper Peninsula of Michigan. Although a large part of his work involved surveying, he assisted in all phases of railroading: reconnaissance, locating, organizing, and construction.
In 1889, Stevens was hired by James J. Hill as a locating engineer for the Great Northern Railway.
Stevens earned acclaim in 1889 when he explored Marias Pass, Montana, and determined its practicability for a railroad. Stevens was an efficient administrator with remarkable technical skills and imagination. He discovered a pass through the Cascade Mountains that bears his name, set railroad construction standards in the Mesabi Range of northern Minnesota, and supervised construction of the Oregon Trunk Line.  Hill promoted him to chief engineer in 1895, and later to general manager. During his time at the Great Northern, Stevens built over a thousand miles of railroad, including the original Cascade Tunnel.
 Stevens Pass in the Cascade Range was named for him. (Most other Pacific Northwest landmarks with the word "Stevens" are named after Isaac Stevens, who is of no relation.)
John Frank Stevens