This (I believe) is a striped whipsnake. It is thin, about 24" long, and very fast.
Desert east of Truth or Consequences, New Mexico, about 4500' elevation.
We saw it about 9 AM on a warm, humid (it had rained 2 days earlier), cloudy day. It posed patiently for the photos and then raced off. Very fast.
Lat: 33.17, Long: -107.26
Spotted on Sep 11, 2012
Submitted on Sep 12, 2012
and 5 other people favorited this spotting