Medusa is a steel roller coaster located at Six Flags Discovery Kingdom in Vallejo, California.

Built by Bolliger & Mabillard, Medusa opened in 2000 as the first floorless roller coaster on the West Coast.

It also shares the height record in Northern California with another two rides in the same park, The Flash: Vertical Velocity, and Superman: Ultimate Flight at 150 feet (46 m) high.

The ride starts with a large left-hand turnaround out of the station and onto the lift hill.

After that is the large 150 feet (46 m) drop which achieves the same height as the lift hill despite the B&M Pre-Drop by dipping below ground level into a pit.