The Yukon has the the free entry system of mining claim staking. Essentially, this means anywhere in the Yukon can be staked unless it has been specifically withdrawn by Government legislation. To show how this can impact the landscape, watch this animated picture showing how the central Yukon landscape was staked from Mar 16, 2009 to Nov 28, 2011. One of the many drawbacks with the free-entry system is that almost anywhere can be staked.
An Act to Amend the Yukon Placer Mining Act and the Yukon Quartz Mining Act has now been debated and passed by the Yukon Legislature. These ammendments are due to the legal ruling of Ross River Dena Council v. Government of Yukon, 2012 YKCA14. Further information is posted on the Yukon Government website. Here are the Yukon Conservation Society comments re: the Yukon Government's June 2013 Discussion Paper on Class 1 Mining Land Use as it relates to the Quartz Mining Act and Placer Mining Act review.
YTG and City of Whitehorse Staking Moratorium: On July 19, 2012 YTG announced a staking moratorium for about 74% of land within Whitehorse municipal boundaries. The press release can be read here.
An useful paper that examines how free entry helps or hinders in the collection of economic rent of minerals was done by Malcolm Taggart for the Canadian Arctic Resource Committee back in 1998. While some of the figures used in the paper are now dated, the analysis is still pertinant. It is availble from the CARC website or by clicking on "The Free Entry Mineral Allocation System In Canada's North: Economics And Alternatives".
Letter from YCS to Bryony McIntyre, Manager, Mineral Planning and Development