Jim Bridwell (July 29, 1944 – February 16, 2018) was an American rock climber and mountaineer, active since 1965, especially in Yosemite Valley, but also in Patagonia and Alaska. He is noted for pushing the standards of both free climbing and big-wall climbing, and later alpine climbing. He wrote numerous articles on climbing for leading sport publications. He was an apprentice to Royal Robbins and Warren Harding (climber). He was the unofficial leader of the Stonemasters.