After much discussion with experts I finally feel comfortable posting this as B. incognitus. Number one reason is because this is the only species of Batrachoseps ever found in this drainage, even though B. nigriventris are found north and south of here. Also has slightly longer limbs than B. nigriventris.
Was run over
N Fork, Hanaupah Canyon, Death Valley N P. Elev. approx 5,000'