Stipe texture and pileus shape of younger ones made me think Mycena but probably not. Xeromphalina? Fruiting from soil in streambank with Abies magnifica and Pinus jeffreyi nearby. KOH brown. Odorless. Chrysomphalina aurantiaca and Galerina sp. in close proximity. KOH brown. Odorless.
Growing on a Lithobiomorpha (stone centipede) found inside of an Abies magnifica log, insect observation is https://www.inaturalist.org/observations/123766553.
this 15 minute documentary provides additional information:
Specimen collected.
Update: Fruiting from a decaying coniferous log in a moist micro-climate of a steep, dry, seasonal streambed in mixed Pinus, Pseudostuga, and Abies forest.
8-spored ascii. Spores ellipsoid, smooth, hyline, eguttulate, and averaged 17.4 x 10.8 microns. All macro and micro features are a good match for C. vernalis
https://pfistergroup.oeb.harvard.edu/files/dpfister/files/perry_chaetothiersia_vernalis.pdf
At the base of an old pine
Strong orange scent
Rotting log, burnt area, Quercus laurifolia and Pinus taeda habitat
Savory odor