Silverwood Theme Park in Athol, Idaho packs wooden and steel coasters, a drop tower, and a growing Boulder Beach water park onto one property, and each attraction posts its own minimum height to keep riders safe on the restraints and rafts they were engineered for. For families traveling with kids of different sizes, knowing those numbers ahead of time makes the difference between a smooth day and a disappointed kid at the ride entrance.
This guide walks through the height requirements for the rides families ask about most, grouped by minimum height so you can see at a glance what a shorter rider can do solo, with a companion, or not yet at all. Ride lineups and minimums change seasonally, so treat the park’s own accessibility and size guide pages as the final word before you go.
Stats at a Glance
- Shortest Requirement: 32 in (81 cm) — Puppy-Go-Round (with a supervising companion)
- Tallest Requirement: 56 in (142 cm) — SpinCycle
- Ride-Alone Height (most rides): 48 in (122 cm)
- Companion Rule: Riders below a ride’s solo minimum may ride select attractions with a supervising companion (16 or older) at that ride’s lower posted height
Height Requirements, Tier by Tier
Aftershock, the giant inverted boomerang shuttle coaster with vertical lift towers at each end, posts the widest rider window of any coaster: guests must be at least 54 inches (137 cm) and no taller than 80 inches (203 cm), a maximum tied to fitting the train’s over-the-shoulder restraints. Tremors, rebuilt with Rocky Mountain Construction’s steel ReTraK track and now running as a steel hybrid coaster on a chain lift, requires 48 inches (122 cm) to ride alone or 42 inches (107 cm) with a supervising companion. SpinCycle posts the tallest minimum in the park at 56 inches (142 cm) solo, or 48 inches (122 cm) with a companion.
A 48-inch (122 cm) minimum covers several other Silverwood favorites, including Stunt Pilot (the single-rail RMC coaster), the classic Corkscrew, the wooden Timber Terror coaster, and the Panic Plunge drop tower. Timber Terror also allows riders as short as 42 inches (107 cm) with a supervising companion.
In Boulder Beach, Eagle Hunt, the dueling water coaster in the Emerald Forest expansion, uses a similar split: 48 inches (122 cm) to ride alone, 42 inches (107 cm) with an adult. Thunder Canyon, the whitewater raft ride, posts one of the park’s lowest minimums at 42 inches (107 cm) solo or 36 inches (91 cm) with a companion.
On the kiddie side, Puppy-Go-Round posts the park’s shortest verified minimum — 42 inches (107 cm) alone, or just 32 inches (81 cm) with a supervising companion — and Krazy Koaster allows 48 inches (122 cm) solo or 36 inches (91 cm) with a companion. Salmon Run, the kiddie water area in Emerald Forest, works in reverse: it’s built for younger guests, so riders taller than 54 inches (137 cm) may only use it while accompanying a smaller rider under that height, rather than riding solo.
Tips for Families Visiting Silverwood Theme Park
Measure kids at home before you go, without shoes, and round down if they’re right on a line. Silverwood measures children once at the Information Center just past the train station and issues a wristband based on their height, so they don’t need to be re-measured at every ride entrance, though attraction staff still double-check as a safety step. If a child doesn’t clear a ride’s solo minimum, check first whether that ride offers a lower companion height — Tremors, Timber Terror, Eagle Hunt, Thunder Canyon, Puppy-Go-Round, and Krazy Koaster all do — before ruling it out entirely. Kids who clear 48 inches (122 cm) can access most of the park’s marquee thrill rides on their own, while shorter riders will mostly be riding alongside an adult on rides like Thunder Canyon, Tremors, and Timber Terror. Always check Silverwood’s official accessibility and size guide pages shortly before your visit, since ride upgrades and seasonal changes can shift a ride’s posted minimums.
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Silverwood Theme Park Height Requirements FAQs
What is the minimum height to ride at Silverwood Theme Park?
The lowest verified requirement is 32 inches (81 cm), posted on the kiddie ride Puppy-Go-Round for riders accompanied by a supervising companion. Among bigger attractions, Thunder Canyon accepts riders as short as 36 inches (91 cm) with a companion.
Can kids under 42 inches ride anything at Silverwood Theme Park?
Yes — Puppy-Go-Round accepts riders as short as 32 inches (81 cm) with a supervising companion, Thunder Canyon accepts 36 inches (91 cm) with a companion, and the water park’s Salmon Run kiddie area in Emerald Forest is built specifically for shorter guests, though taller riders there must be accompanying a younger child.
Does Silverwood Theme Park measure height at the gate or at each ride?
Neither exactly — Silverwood measures children once, at the Information Center just past the train station, and issues a height wristband so kids aren’t re-measured at every individual ride. Ride attendants still double-check heights at the entrance as a safety step.
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Photo: Matthew Nelson from Hayden, United States / CC BY 2.0, via Wikimedia Commons.