Silverwood Theme Park is the Northwest's Largest Theme Park featuring Tremors, a 60 mile per hour, heart-in-your-throat, screaming underground roller coaster, plus it's equally twisted cousins Timber Terror and the Corkscrew. Ride a vintage steam train, challenge a gigantic wave pool and monster waterslides or enjoy dazzling live entertainment. Silverwood Theme Park has over 65 rides, slides, shows and attractions, including four roller coasters, Boulder Beach Water Park, a steam engine train, live entertainment, restaurants, and more...