East Longs Peak Trail – Longs Peak Trail – Keyhole Route – Shelf Trail
 The East Longs Peak Trail Longs Peak Trail and Keyhole Route-Shelf Trail in Rocky Mountain National Park are listed on the National Register of Historic Places for their significance in the early recreational development of the park. The East Longs Peak Trail was laid out in 1878 by Reverend Elkanah H. Lamb long before the designation of the region as parkland. It was extended in 1910 by Enos Mills.