This album features all the hits and is a testament to Spirit's dynamic musicianship, their ability to connect with audiences, and offers an immersive live listening experience, transporting fans to the heart of this unforgettable concert. Live at Mile Square Park, recorded on October 27th, 1991, encapsulates the raw energy and remarkable talent of Spirit during an electrifying outdoor performance set against the beautiful backdrop of Mile Square Park in Fountain Valley, CA. The final live performance of the original five members.

The original lineup of the group evolved from a Los Angeles band, the Red Roosters, which included Randy California (born Randy Craig Wolfe; guitars, vocals), Mark Andes (bass) and Jay Ferguson (vocals, percussion). With the addition of California's stepfather Ed Cassidy on drums, and keyboard player John Locke, the new band was originally named the Spirit's Rebellious (after a book by Kahlil Gibran), but the name was soon shortened to Spirit.

Their most commercially successful single in the United States was "I Got a Line on You". They were also known for their albums, including their self-titled debut album, The Family That Plays Together, Clear, and Twelve Dreams of Dr. Sardonicus.