This animal seems like maybe it was in its defensive posture, called an Unken reflex.
A slight distinction between torosa and granulosa is that in the unken reflex, torosa's tail does not curve towards its head whereas in granulosa the tail tip curves toward the head and sometimes curls. Examples can be seen here: http://www.californiaherps.com/salamanders/pages/t.t.torosa.html and here: http://www.californiaherps.com/salamanders/pages/t.granulosa.html.
It's difficult to see the coloration under the eye, but based on the position of its tail, I wonder if this is T. granulosa. Kept ID to genus level only.
This observation is part of an ongoing study of Pacific newt roadkill on Alma Bridge Road, Lexington Reservoir. See our project page for more info.
url: https://www.inaturalist.org/observations/68574638