Likely porcini species at this location
Colorado has 3 native porcini in the Boletus edulis group. Each prefers a different elevation band & host tree. Color shows which is most likely based on elevation alone.
Boletus rubriceps — Rocky Mountain king bolete
~10,006 ft ± 984 ft (3050 m ± 300 m) · hosts: Engelmann spruce, subalpine fir, bristlecone pine
Boletus edulis s.s. — King bolete
~9,022 ft ± 984 ft (2750 m ± 300 m) · hosts: Douglas-fir, blue spruce, lodgepole pine
Boletus barrowsii — White king bolete
~8,202 ft ± 902 ft (2500 m ± 275 m) · hosts: Ponderosa pine, Gambel oak woodland
v1: elevation envelope only. Future versions will weight by per-host FIA basal area to discriminate spruce-fir vs aspen vs lodgepole stands at the same elevation.