The Caution Zone

The Caution Zone was a backyard roller coaster built by Will Pemble in Orinda, California. Pemble was inspired to build, alone with his family members, the roller coaster after riding the Kingda Ka in the Six Flags Great Adventure amusement park.

The coaster was 180 feet long, fifteen feet high and cost US$3500 to construct. It ran until 2015.