Growing amongst grasses on north-facing slope near sea cliff edge. I could not find leaves.
Captured by great blue heron
Found dead with one hind leg missing. And big slobber mark on it, as if carried...
Maybe Micrutus townsendii pugeti
https://www.heraldnet.com/life/biologist-setting-traps-for-a-species-of-san-juan-islands-vole/