Examples from the Web for yampa
There are three river entrances to this park: one down the Yampa; one below, by coming up the Green; and another down the Green.
The canyon in this part of the course of the Yampa is cut through light gray sandstone.
Here a stop was made for several days, and one evening some of us took a boat and went up the Yampa a little distance.The Romance of the Colorado River|Frederick S. Dellenbaugh
The Green is greatly increased by the Yampa, and we now have a much larger river.
The Major during an exploring trip from the eastward in 1868 had reached the Yampa Canyon, but he could not cross it.A Canyon Voyage|Frederick S. Dellenbaugh