Mountain Garter Snake Posted on August 18, 2018 by Mike Pingleton Leave a comment Thamnophis elegans elegans (Baird & Girard 1853) Yuba Co., California. May 7, 2014. This snake was observed in a shallow stream flowing down out of the foothills. This species is featured in my Notes From The Field blog post ‘Thamnopalooza‘. My Flickr album for this species is here.