The Winona Mill Site is the remains of a mining operation, started by George Hulsey in the 1920's. The claim included a ball and chain mill and a gold mine at Mastodon Peak. The mill was used for the crude refinement of gold ore from the Mastodon Mine and the smaller claims of the Dale Mining District. Although no buildings remain, traces of their presence can be seen in the remains of water tanks and the foundations of several buildings.

The mill did custom ore processing for nearby mines in Hexie Mountains as well. There once was a small mining camp here with numerous buildings and equipment including a jaw crusher, ball mill, classifiers, and amalgamation tables, all to process gold ore.