This is the same observation as recorded by Ken-ichi here.
Definitely Peromyscus as opposed to house mouse or harvest mice because tail is more than 1/3 length of body, and no grooves on upper incisors. Pinyon mouse as opposed to deer mouse because ears are longer than 18 mm and hind feet longer than 21 mm. This would be out of range, and slightly too small for P. californicus (which would be about 20 mm longer)
Peromyscus truei (Shufedlt, 1885) or the pinyon mouse, is native to the southwestern United States. These medium sized mice are often distinguished by their relatively large ears. The range of this species extends from southern Oregon and Wyoming in the north, and extends south to roughly the U.S.-Mexico border, with a disjunct population designated as Peromyscus truei comanche which occupies an area in the vicinity of Palo Duro Canyon in the Texas panhandle.