The song became Ross's first solo number-one hit on the Billboard Hot 100 chart and was nominated for the Grammy Award for Best Female Pop Vocal Performance.

British soul singer Dusty Springfield wanted to record the song but the duo declined, hoping it would give them access to the Detroit-based label.

"[10] This original version of "Ain't No Mountain", produced by Fuqua and Bristol, was a care-free, danceable, and romantic love song that became the signature duet between Gaye and Terrell.

That song was an album cut from a joint LP released by Motown Records in 1968 on the two superstar groups, titled Diana Ross & the Supremes Join the Temptations.

In early 1970, after the Top 20 success of her first solo single, "Reach Out and Touch (Somebody's Hand)", Ashford and Simpson had Ross re-record "Ain't No Mountain High Enough".

The remake was a complete reworking of the song, featuring a style similar to gospel with elements of classical music strings and horns, and spoken-word passages from Ross.

The Andantes, Jimmy Beavers, Jo Armstead, Ashford & Simpson and Brenda Evans and Billie Calvin of the Undisputed Truth were used as backing singers, giving the song a soul and gospel vocal element.

This version is also featured in the fifteenth season of RuPaul's Drag Race as a lipsync battle between the bottom two of the week, Princess Poppy and Amethyst, resulting in the former's elimination.