There is a very famous route in Cusco for many hikers, it's called "Balcon del Diablo" and it's also possible to do it by bike.
This route start in a village called Salkantay (3650 meters) and 20 minutes from the city of Cusco. From there starts a trail that goes through the Balcon del Diablo and directly to the city centre. 11km through incredible mountain trails.
65% downhill / 25% uphill / 10% flat
Difficulty level: intermediate/advanced / Black Diamond
Trail distance: 11km
Altitude starting point (Salkantay Village): 3650 m.a.s.l.
Altitude arrival point (Cusco): 3353 m.a.s.l.
Highest point: 3960 m.a.s.l.
Accumulated ascent: 482 m.
Accumulated descent: 820 m.
**Travel time to the starting point is 1:30 hours by car and 4 hours cycling from the Plaza de Armas in Cusco.