Serpent's Run is the largest building in Magnimar, quite a feat in the so-called city of monuments, and is located in one of the city's most prosperous areas, the Marble District. The Serpent's Run serves Magnimar as its arena and most popular entertainment venue; the hippodrome can seat up to 5,000 people, over a quarter of Magnimar's total population. Unlike many other arenas, the Serpent's Run specialises in non-bloodsports like dog and horse racing, decathlons, and magic displays. However, the late-summer rodeos sponsored by the Matador's Lodge are also held here.
The arena is named for the carving of a gigantic serpent that runs around the upper rim of the arena, a tribute to the serpent slain by Alcaydian Indros. It is run by Master of Games Jorston "Axetongue" Droaeb.
- F. Wesley Schneider. (2007). Magnimar. The Skinsaw Murders, p. 59. Paizo Publishing, LLC. ISBN 978-1-60125-037-7
- F. Wesley Schneider. (2007). Magnimar. The Skinsaw Murders, p. 57. Paizo Publishing, LLC. ISBN 978-1-60125-037-7
- Adam Daigle and James Jacobs. (2012). Magnimar, City of Monuments, p. 9. Paizo Publishing, LLC. ISBN 978-1-60125-446-7