Pacific Ridge Exploration Ltd. reported that at the Mariposa gold property, located within the Yukon's White Gold District, the 2012 exploration field work came to a close in early October 2012. This year, the fourth year of exploration at Mariposa, saw 2448 metres of diamond drilling completed in 14 holes within the Skookum Jim and Big Alex target areas. Approximately 800 metres of trenching tested 15 gold-in-float zones within the Skookum Jim Main and West targets. Over 3,000 soil and silt samples were collected, largely from the eastern regions of the 262 kilometre square Mariposa property. Mariposa 2012 exploration expenditures to date are in the order of $1.7 million. Cash working capital is currently $900,000.

On September 21, 2012, Janice L. Fingler, resigned from her position as Vice President Exploration of the company effective September 25, 2012. The company's Board of Directors has accepted Ms. Fingler's resignation.