Tombstone Mountain, a towering plutonic intrusion, is at the heart of southern Ogilvies. It is also the namesake for Tombstone Territorial Park. This park straddles the Dempster Highway – a narrow strip of gravel in an immense expanse of northern Yukon wilderness. Multiple alpine glaciations have sculpted the rock spires and left behind distinctive features such as cirques, tarns and moraines. The Tombstones are at the southern edge of Beringia, a unique region that was not scoured by continental glaciers during the last ice age.