Small yellow flowers
Island on East Fork Salmon River
Elevation: 5856ft (1785m)
Associated spp: Populus trichocarpa, Salix boothii, S. exigua, S. geyeriana, S. lucida, S. lutea, Ribes sp, Potentilla sp, Rosa woodsii, Centaurea stoebe, Lonicera involucrata, Carex sp., Juncus sp., Equisetum arvense, Poa sp., Ranunculus acris...
Think this is G. macrophyllum. Still not entirely sure if it is that and not G. aleppicum.
Geum macrophyllum, commonly known as largeleaf avens, is a flowering plant found from the Arctic south to the northern U.S. states, and in the Rocky Mountains and west to the Sierra Nevada in California and as far south as Northwestern Mexico.