Introduction to Camp No. 4: Camp No. 4 is also called Basin Camp. It is a very flat platform, like a basin. This is the forward camp for climbers to adapt and wait for good weather for the summit. Climbers stay here the longest. After adapting, once they wait for good weather, they rush directly to Camp 5 and summit at the right time. Denali National Park staff are permanently stationed here and have the most luxurious fixed toilets on the entire climbing route. Potential risks: light and dark cracks. From Camp 4 to Camp 5, the ascent is 900 meters, the distance is 2.6 kilometers, the slope is very steep, and it is expected to take 8-10 hours. This section of the route is the steepest and most beautiful section of the entire climbing route, with the famous head wall and the very eye-catching Washburn’s Thumb in the middle. Potential risks: Crowded climbing, falling ice, post-blizzard avalanches, high winds, slips and frostbite.