This Loop takes you on the Cushetunk trail starting and finishing at the sign at the Cushetunk Mountain Preserve trailhead. You first climb up to the ridgeline where you first see the Round Valley Reservoir, which you will be circumnavigating on varied terrain from some technical sections in the beginning to more runnable trails.  Your last 4.5 miles will have you finishing strong on pavement soaking in the views of of the Cushetunk mountain range you traversed before finishing back at the sign. This is a great loop to explore with a solid mix of challenge.

There are very few ways to cross the southern part of the Ko'olaus. This route does that and tags five major Oahu peaks while staying on public land. The route starts from Ala Moana Beach, southern side of Oahu near Waikiki. Head North passing through Honolulu city then trail begin at the bottom of Tantalus, one of the tropical jungle mountain.