- Located within the Halelea Forest Reserve this trail starts at Kapaka Street, up the road from Princeville Stables. It follows a 13 mile electric transmission line maintenance route and ends near the Keahua Forestry Arboretum in the Lihue-Koloa Forest Reserve. This is a dry-weather, all day hike. It is not for motor vehicle travel beyond the paved road. Note: Access from the southern end is possible from the Keahua Forestry Arboretum. Steep, eroded, slippery at saddle. Commercial use by permit only.