If I had to make a Top 100 music tracks in gaming, about a third of them would be from Chrono Trigger. Highlights include the various Guardia-themed tracks, the Kingdom of Zeal's assortment of atmospheric tracks, 2300 AD's music when exploring, the basic Battle music, the character themes for Frog, Robo, Magus, and Lavos, and the dungeon music for Magus's Castle, Tyran Castle, and the Black Omen. Plus, "At The Bottom of Night" and "The Day The World Revived" are genuinely emotional.
I just unintentionally listed about half of the game's soundtrack as hgihlights, but that's only because so many tracks fully capture their corresponding area, character, or other subject, and do so in a way that makes the best use of the SNES's capabilities.
Singing Mountain is also phenomenal, but it was cut from actual gameplay.