Erigeron peregrinus var. peregrinus, from hairy involucres (vs. E. glacialis).
From Flora of North America:
E. glacialis: Phyllaries "usually glabrous, rarely sparsely villous (cross walls not colored), densely and evenly stipitate-glandular".
E. peregrinus: Phyllaries "margins usually ciliate, abaxially sparsely to moderately villoso-hirsute, usually eglandular, sometimes sparsely gland-dotted apically, rarely sparsely so over adaxial faces".
E. peregrinus var. peregrinus is the var. that occurs here: "Phyllaries moderately to densely hirsute to hirsuto-villous; rays purplish to pink or white" (vs. E. peregrinus var. thompsonii which is less hairy, has white rays and is found in WA).