Start this hike by 6am or thick midday clouds will ruin the entire panorama. It is a straight-up vertical grind through avocado groves, so grab a wooden stick at the gate to save your knees. Skip the $67 horseback tour—it barely reaches the summit anyway. Book the $57 guided hike instead, pack three liters of water, and prepare to sweat. The caldera view at the top makes the burning calves worth it. Don't look back until you finish.

