"When You Made the Mountain" is an "environmentally themed" electronica/dance song recorded by English electronic music group Opus III with vocals by Kirsty Hawkshaw. It was released in 1994 as the lead single from their second album, Guru Mother (1994), and received positive reviews from music critics. The track got as far as number 75 on the UK Singles Chart, but it would go all the way to number-one on the US Billboard Hot Dance Club Play chart, giving the act their second and final chart-topper in the United States.