Exercise caution on the Puʻu Kōnāhuanui Ridge Trail, a 12.4-km out-and-back trail near Honolulu, Oahu. Rated as highly challenging, it typically takes around 5 hours and 47 minutes to complete and is suitable only for experienced hikers. Popular for birding and hiking, expect to encounter other enthusiasts on the trail, especially during the peak months of April through October. Please note that dogs are not permitted on this trail.