Well let's see, I'm guessing that the ribbon, the one with the dots on the head is some supspecies of T.proximus....Western Ribbon, the other snake I"d have to guess is some subspecies of T.sirtalis, best bet....count those scales....an accurate scale count always helps. The one pic of the garter though really does show a lot of the characteristics of T.s.parietalis RedSided Garter, especially with the bit o' red on it. But there's NO WAY I'd give that a definite.
Only definites I'll give is T.proximus for the one and T.sirtalis for the other (and I'd really like to see a scale count just to be sure!)
Roy