Knightmare was a custom roller coaster at the now defunct Camelot Theme Park in Chorley, Lancashire, United Kingdom.

After Portopialand closed in March 2006, the roller coaster was acquired by Camelot Theme Park and was dismantled and shipped to the United Kingdom.

The ride then took passengers through various sharp turns, multiple helixes and a near-vertical bend (nicknamed "the psycho drop") halfway through where they experienced almost 5 g, reaching speeds of about 40 miles per hour (64 km/h).

After having trouble with low visitor numbers, The Story Group and Knights Leisure Limited announced that they were permanently closing Camelot Theme Park in November 2012, after 29 years.

In recent years, there were incidents regarding safety concerns of urban explorers climbing 80 ft to the top of the roller coaster's lift hill.