Right next to juneau UAS campus between hiking path and roadway next to Hendrickson Building.
Seen on a fallen birch log in an area of largely undisturbed boreal forest of white spruce and paper birch. It was as large as a dinner plate, 6 or 7" across.
Spruce gall rust
Host: Salix sp.
Host obs: https://www.inaturalist.org/observations/176711793