This garter snake was found on the Canyon Trail at Silver Falls State Park.
head clipped by tire, but not flattened; 7/9 upper/lower labials; saved as specimen PSM 11109 (after pickling, reexamined and 9 lower, 7 upper both sides); 17 mid-body scale rows
smashed, 7/8 upper/lower labials, probably NW Garter snake, other two species ~10 lower
Flattened, scoped at museum, 7/8 upper/lower labials=NW Garter snake of 3 possible species
NW pending scale count; at museum under scope, 7/8 upper/lower labials, 19 scale rows mid body NW Garter snake
Unfortunately this was road kill...
ID based on 7 upper labials and relatively small eye. Stebbins writes that striped individuals run away quickly with a lot of movement because it makes the movement of the stripe confusing, while plain individuals often move abruptly and then stay still, which is exactly what this snake was doing.
The northwestern garter snake, Thamnophis ordinoides, is a species of colubrid snake endemic to North America.