Mount Longonot, a dormant volcano within a national park in Kenya's Great Rift Valley, offers a challenging yet rewarding hiking experience to its crater rim and around the crater. It's generally accessible by road from Nairobi, with the dry seasons (January-March, July-October) being ideal for clearer views and less muddy trails, though it's open year-round. While possible to visit solo, hiring a local guide is highly recommended for safety and navigation. The typical visit duration, including the hike to the rim and optional crater circuit, ranges from 4-7 hours, making it a full-day excursion from Nairobi. Approximate costs include park entry fees (around $30-35 USD for non-residents), optional guide fees, and transportation, totaling potentially $60-$150+ USD per person. Hikers should be prepared for a steep ascent, bring plenty of water, sturdy boots, and sun protection, enjoying panoramic views of the Rift Valley and Lake Naivasha from the summit.