Mormon trail
siskyou trail
Oregon Trail
The transcontinental railroad was built by the Union Pacific Railroad going west from Omaha, Nebraska. They built their part of the railroad to Promontory, Utah. The Central Pacific Railroad built the other part of the transcontinental railroad starting in Sacramento, California and built east meeting the Union Pacific Railroad.
Early pioneers did not but later ones 1870's and on usually did.
it was not formed it was built
The first transcontinental railroad was funded with government money.
Temperature, hygiene, hunger
it was built in 6 years
1865-1869
Oregon Trail
Travel was easier?
It was fertile land.