This hike loops over Mahinui Ridge, also known as Kalaheo Hills, and optionally continues to the Aikahi Pillboxes. You start and end on a well-maintained mountain bike trail that rewards you with good views from several points along the open ridge top. The optional extension is more difficult. You'll face scratchy overgrowth, slippery slopes and rusted barbed wire hidden in the plants. Eventually you reach the summit of Pu'u Papa'a with utility towers, WWII bunkers and views over the Mokapu Peninsula.

gray areadogs iffyyear-roundany vehicle