New Mexico mainly and a tiny bit of Oklahoma. There is also a 4-way border with Arizona to the southwest (at the 4 corners of Utah, Colorado, Arizona, and New Mexico).
It's Utah.
Wyoming is the state that borders Montana, Idaho, Utah, Colorado, Nebraska, and South Dakota.
The state is Wyoming.
Wyoming
Nebraska is the only US state that borders both Colorado and Iowa.
colorado idaho
Wyoming
Kansas borders the east of Colorado.
Mexico borders the Mountain States on the south.
New Mexico is located to the south of Colorado and has part of the Rocky Mountains within its borders.
South Dakota borders Nebraska on the north.
Colorado