Tuesday, October 28th was our arrival goal for Black Hills National Forest, South Dakota, which gave us 3 whole days to spend in Northern Colorado.  Having never been to Colorado before, we were both eager to check out the mile-high city highly regarded by outdoor adventurers.  We evenly divided our time between Rocky Mountain National Park, Boulder, and Denver for a taste of the Rockies and well-missed metropolitan city life. Perhaps it was the last warm autumn Saturday before daylight savings time could begin, but the crowded Rocky Mountain National Park was a culture shock after arriving from the deserted Yellowstone National Park.  Like Zion, Rocky Mountain offered…