Advanced mountaineering skills and experience are required to reach the summit of Mount Rainier. The most common route to the summit is via the Disappointment Cleaver, which begins in Paradise (5,400 feet) and ascends via Camp Muir (10,188 feet) to the crater rim (14,410 feet). This climb usually takes 2 to 3 days and requires permits, good planning, and proper equipment, including crampons, ice axes, and ropes. It is recommended to hire a local guide for safety reasons and to assist with logistics.