The Mahogany Forest section can accessed from a few different ways from the Keystone East or West parking areas. The most straightforward 'out-and-back' which, in this case, would also be and an 'up-and-down' would be to park at the Keystone West parking area.
On the MTB Project mobile app
, you can follow the Peavine Challenge XC Course up. You know you are starting the Mahogany section proper when you hit tree line and there is also a bench made from a snowboard.
From there, you continue on what is only an out-and-back section to the end and top of the ride which offers great views of the entire valley below and all of Reno. The whole ride is consistent in flow, terrain, and difficulty.
From the top, you either come back the exact way you came up, or at the snowboard bench you could go left and link a number of options together and wind up in the Keystone East parking lot which is about a mile ride back to the West parking lot. In total, the out and back is about 18 miles, which means once you are at the top, you have a nine-mile descent.
The top section in particular can hold water/stay muddy longer as it's in a valley and doesn't get as much sun. Early snow can also stick around in small pockets. Calling this 'Intermediate/Difficult' due to the length of the climb and some short pieces are steep(ish). But, for the most part, the trail is very clean and serious technical skills are not required.