Noted as the "GDN Pick Lease" on the Silver Pick Property.
'GDN' could mean Golden, but as yet I've not found such a claim.
The date is early January 1910, as a heavy snowfall took place throughout the region on January 2-3.
Judging by the condition of the snow, it's probably around the 6th.
The wire on the poles is the main electric supply from Bishop, California.