Midnight Lightning is a bouldering problem on the Columbia Boulder in Camp 4 of Yosemite National Park. It has been described as the world’s most famous bouldering problem. The first ascent was by Ron Kauk in 1978 and the first female ascent was by Lynn Hill in 1998. The chalk lightning bolt was drawn by John Bachar in 1978, while attempting the problem with John Yablonski and Ron Kauk. In May 2013, the chalk lightning bolt was scrubbed off the face of the boulder. The bolt was re-drawn in the same location a few days later.