The Lincoln Heritage Trail is a convoluted network within Kentucky, Indiana, and Illinois which purports to map Lincoln's early life.
Gary, you are thinking of the Lincoln Highway, the "first road across America". It goes from Times Square in New York City to Lincoln Park in San Francisco (site of the California Palace of the Legion of Honor).
(click on the map)
Most of US Route 30 and portions of Interstate 80 now travels the same general corridor from New York to San Francisco.
"The Main Street Across America"