QuestEx Gold & Copper Ltd., formerly Colorado Resources Ltd., is a Canada-based mineral exploration company. The Company is engaged in exploring gold and copper with a focus on the Golden Triangle and Toodoggone areas of British Columbia. The property portfolio includes the Castle property, a porphyry copper-gold project located in the Red Chris mining district of the Golden Triangle neighbouring GT Gold's Tatogga property, and Newcrest Mining's GJ property. Other properties include KSP, North ROK, Coyote, and Kingpin in the Golden Triangle, Sofia in the Toodoggone district, and Heart Peaks and Hit in other strategic districts within British Columbia.