Oregon trail and what trail?

Beacuse it went to Oregon. But many trails branched off to other places.

No, the Oregon Trail was used by people moving to settle in Oregon later in the Nineteenth Century. It didn't exist yet when Lewis and Clark surveyed the land the United States gained in the...

People wanted to go west and settle there. Some went west to get rich, by usually finding gold.

Many rivers and mercilous mountain trails were some of the hazzards on the Oregon trail.

The Oregon Trail was the trail leading out of Independence Missouri to the Oregon Territory ending mainly in the Willamette Valley, the trail was started shortly after the Civil War in the 1860s.