Tremors is a wooden roller coaster located at Silverwood Theme Park in Athol, Idaho.

The design was finalized by Custom Coasters International, and the ride was constructed in house by the park.

This theme was later extended to the Aftershock roller coaster next door when it opened in 2008.

Tremors held the record for most times underground on a wooden coaster from 1999 to 2006, when the Voyage opened at Holiday World in Santa Claus, Indiana.

The new system, similar to the company's new Iron Horse I-Box track system is designed to cut down on track maintenance, as well as daily wear and tear.