Photo by Andrea Rip (image from the adjacent Mariner's Ridge Trail)
Kuliouou Ridge Trail
Escape the hubbub of Honolulu and stretch your legs on this 4.4-mile, moderate, out-and-back path. Somewhat steep, this serious glute workout attracts a lot of trail runners, especially on the weekends. The hike begins among rocks and small shrubs, then snakes among massive tree roots, before the dirt stairs near the top. The ridge unfurls gorgeous views of Waimanalo and the Nā Mokulua Islands, as well as Rabbit Island and Koko Crater. Note: drivers have to park in a residential neighborhood, then walk up an access road. Start early to avoid the heat and crowds, and make sure to bring plenty of water.