Back before the internet, hikers only had one tool to explore Rocky Mountain National Park. They simply called it the Dannen book. Kent Dannen, seen in this undated photo, wrote the guidebook ...

Rocky Mountain National Park encompasses ... of free days every year, though the park is extra crowded on these select days. While this national park is open 24/7 year-round, it is busiest during ...

Average annual temperature increase over the last century in the high-elevation park from climate change Rocky Mountain National Park covers 415 square miles atop the Continental Divide in the Front ...