Steppenwolfer (March 16, 2003 - June 21, 2018) was an American Thoroughbred racehorse.

He was a contender for the Triple Crown in 2006, but fell short by finishing third to Barbaro in the Kentucky Derby.

Steppenwolfer was sold to Gail Thayer of Unionville, Pennsylvania and was re-trained as a foxhunter.

He was first owned by two very successful horseman John Mayer the owner of Nursery Place Farm and his wife's brother Happy Broadbent.

He was walked as a yearling by the two sons of John Mayer, Griffin the older of the two and Walker the younger, and then sold as a two-year-old for $25,000.