Wikipedia: The Oregon Trail is a 2,000-mile (3,200 km) historic east-west large wheeled wagon route and emigrant trail that connected the Missouri River to valleys in Oregon. The eastern part of the Oregon Trail spanned part of the future state of Kansas and nearly all of what are now the states of Nebraska and Wyoming. The western half of the trail spanned most of the future states of Idaho and Oregon.
See:
- Wikipedia Article
- National Park Service
- Genealogical Material in Oregon Donation Land Claims, Vol.1, oregongenweb[1]