There are four bridges crossing the creek, one of which is a train bridge. The three largest bridges are part of the Under The Bridge challenge.
Events of GTA VIn the mission Derailed, Michael and Trevor hijack a freight train with Merrywheater Security cargo. Trevor lets it crash on the train bridge above Cassidy Creek. Most cargo containers fall into the water where Michael blows the doors of off the target container in order to get the payload located inside. Once the loot has been collected Trevor fends off Merryweather troops while Michael pilots their Dinghy through the creek towards the ocean to escape.
- There are four parachute jumps in this area that the player can complete.
- The name could be a reference to Phil Cassidy, but more likely a nod to a classic scene from the film Butch Cassidy and the Sundance Kid, in which the titular protagonists jump off a cliff, similar to those in Raton Canyon, into rapids below.