Size: 1.0 - 1.2 inch wingspan
Key ID features: Male dusky gray-blue to sky blue above, dark gray wing borders with white fringes, black cell end bars (FW), and white circles with black centers along trailing margin. Female mostly gray to gray-brown above, with prominent FW cell end bar and light blue-gray circles with dark centers along trailing margin. Below FW and HW have black spots ringed with white, and submarginal row of black checks or chevrons rimmed in white against brown or gray-brown background, with marginal row of black spots rimmed with white.
Similar species: Arctic Blue has white patches against dark gray background on HW below, and may or may not still exist in Oregon.
Host plant: Likely to be Shooting Stars (Dodecatheon aplinum and D. jeffreyi).
Habitat: Moist meadows above 5,000 feet.
Range: Along the crest of the southern Cascades, along the western border of Klamath County.
Season: Late June to early August
Conservation Status: Secure