Lily mountain round trip just outside of Estes Park, CO. 

https://www.fs.usda.gov/recarea/arp/recarea/?recid=36799

This is the most direct way to link two of the most popular refuges of the western part of Little Dolomites. It starts from Rifugio Bepi Bertagnoli (1225m) in Piatta area at Campodalbero (VI) and ends at Rifugio Mario Fraccaroli (2238m). The routes moves along historical mountain way, a mix of step single track and more regular trail path. From Rifugio Bertagnoli up to Scagine pass along the Bepi Bertagnoli route. Then up to the Zevola pass, to the Lora pass, down to Tre Croci, up again to Plische pass and down to Rifugio Scalorbi.

The Icknield Way is unique among long distance tracks because it can claim to be "the oldest road in Britain". The ancient route consists of prehistoric pathways, old when the Romans came. Dotted with archaeological remains, it survives as splendid tracks and green lanes along the chalk "spine" of England.

The Icknield Way Path runs from the end of the Ridgeway Path at Ivinghoe Beacon, near Tring, to the start of the Peddar's Way at Knettishall Heath, near Thetford, for 110 miles.