Mills Lake Professional Review and Guide
"Likely the second-most popular hiking trail in Rocky Mountain National Park leads to a rock-rimmed tarn spreading picturesquely below Longs Peak, the ragged Keyboard of the Winds, and Pagoda Mountain. Because beauty is more than a joining of visually appealing elements, the many hikers who praise Mills Lake as the most beautiful in the national park likely are correct.
This is an extreme claim, considering Dream, Chasm, Nanita, and many other extraordinary lakes within the park. But when pioneer innkeeper Abner Sprague named Mills Lake for Enos Mills, known since 1915 as the “Father of Rocky Mountain National Park,” the lake gained an aura of high regard boosting its beauty to the top spot."