Mount Pulai Reservoir - Ulu Choh. Moderate • 4.5 (30) Gunung Pulai Recreational Forest. Photos (95) Directions. Print/PDF map. Length 3.2 miElevation gain 1,069 ftRoute type Out & back. Discover this 3.2-mile out-and-back trail near Kulai, Johor. Generally considered a moderately challenging route, it takes an average of 2 h 1 min to complete.