Collection location: near Diamond and Crater Lakes, Douglas and Klamath Cos., Oregon, USA [Click for map]
Found during the 2002 NAMA Foray.
This does look more like Boletus aereus than B. mirabilis. B. aereus can have yellow tubes depending on conditions and age. The pileus and stipe surfaces do not appear correct for B. mirabilis.
The specimen was growing in deep woody debris and had yellow pores. B. aereus has white pores and in my experience in California tends to grow in mixed hardwood/fir forest. This was growing in mixed conifer forest (hemlock, fir, pine I believe).