"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.

[1] Larry Flick from Billboard described it as a "jaunty, futuristic anthem that has a more fully realized song structure and an assured vocal."

"[2] Linda Ryan from the Gavin Report commented, "As with their 1992 hit, "It's a Fine Day", Opus III manage to convincingly toe the line between unabashed pop and club-inspired dance music.

"[3] Another editor, Dave Sholin, added, "Listening to lead singer Kirsty Hawkshaw and the beat that drives this song, it's possible one might get hypnotized.

"[4] Jennifer Nine from Melody Maker wrote, "Not unmemorable shimmery chart dance pop, with a good beat, witchy girl vocal, and zoomy synths and stuff.