I observed this tiny creature burrowing through the dusty soil of Cachuma Lake Recreation Area in Santa Barbara County, California, on June 8, 2014, about 7 a.m. I have really no clue what it could be, other than an annelid, or newly hatched type of legless lizard or snake. But it seems too tiny for the latter. Yet, I would think an annelid would need more moisture, or different soil. Do worms live in dust? I watched it for about five minutes, maybe more. Burrowing under and re-emerging. So that seemed to be its normal environment.
Here's a closeup, and a link to a Youtube page I put up for it. Video on Youtube of animal's movement