Alain Mesili (born 24 February 1949 in Paris) is a climber and mountain guide, photographer and political activist based in La Paz, Bolivia. He was a political activist in France during the 1968 student riots. In 1969 he left the country, disgusted by the French Communist Party's failures, for Argentina. Over the period of a year Mesili explored Patagonia, crossing the Southern Patagonian Ice Field; he may have been the first person to travel through modern-day Los Glaciares National Park. He further explored the Cordillera Darwin and crossed into Chile. He later moved to La Paz, where he worked as a mountain guide.