Do I need to know how to swim?

Yes. Much of the course sits over deep water; participants must be able to swim and PFDs are required and provided.

Can I remove my PFD while on the course?

No. PFDs must remain securely fastened while in or on the water for safety reasons.

Are dogs allowed at the inflatables?

No. Dogs are not permitted on the inflatables, though other River Riders activities may allow pets with a PFD.

Are there lifeguards on duty?

Yes. Certified lifeguards supervise each session and lead the safety briefing before participants enter the water.

Do I need a reservation to enter the waterpark?

Yes. Entry to the quarry waterpark requires a paid reservation; walk-ins are not permitted.

How early should I arrive to check in?

Arrive 30 minutes before your scheduled start to complete waivers, watch the safety briefing, and gear up for your session.

Harpers Ferry Quarry Waterpark: Inflatable Adventure at River Riders

On a sun-drenched summer day in Harpers Ferry, West Virginia, a quarry has been reimagined as a high-energy playground: River Riders’ COMBO - WaterPark invites families and adrenaline-seekers to jump into a 1.5-hour session on a course of giant inflatables set inside a crystal-clear quarry basin. Located at 320 WaterPark Way, Millville, WV, this new 2025 attraction stretches nearly the length of a football field and stitches together seven massive inflatable elements, two spinning disks, and a central Ninja Warrior-style obstacle run that sparks friendly races, climbs, and splashy wipeouts. Sessions are strictly reservation-only; check-in begins thirty minutes before your slot, waivers must be completed, and personal flotation devices are supplied for every participant. The park enforces age and size limits—participants must be at least five years old, at least forty-five inches tall, and able to swim—so plan accordingly for families. Lifeguards oversee sessions, shoes are prohibited on the inflatables (bare feet or water socks only), and staff run a brief safety briefing before each launch. What makes this waterpark stand out is its setting: a former quarry whose steep rock walls funnel clear, cool water into deep swimming channels that feel remote despite being minutes from Harpers Ferry’s historic town center. Birds and riverine wildlife frequent the rim, so keep an eye out for kingfishers and herons while you climb; the open-water design also offers expansive sightlines that make parents more comfortable supervising energetic kids. Logistics are straightforward: tickets include entry, a PFD, and seating for non-participating companions, but bring sunscreen, a change of clothes, water, and snacks because on-site food is not currently available. Plan to leave jewelry secured and valuables locked in your vehicle or at the River Riders main office; the quarry runs rain or shine, and sessions move forward unless conditions create a safety concern. For photographers, golden hour softens the vertical quarry walls while midday brings saturated aquamarine water tones; aim for low-angle compositions near the entry point and close-ups on action around the Ninja course. Whether you’re booking a family outing, a birthday party, or a group session, the COMBO - WaterPark offers a concentrated burst of summer play in a dramatic, rock-framed basin that turns ordinary pool days into an active outdoor experience. Reservations are limited to maintain capacity—groups cap at one hundred participants per session—so book early via the River Riders reservation portal. Expect quick turnover between sessions and staff who prioritize safety and fun. If you have accessibility questions or medical concerns, contact the main office before booking. With predictable logistics, supplied PFDs, and a compact schedule, this waterpark is an easy, high-energy complement to a longer Harpers Ferry weekend that can include hiking, history, and river access nearby today.