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Sterling Hill Mining Museum

Walk into New Jersey's last underground mine and see rocks that glow.

Sterling Hill Mining Museum — Ogdensburg, NJ

At a glance

  • A real, walkable underground mine, not a replica or model
  • The fluorescent mineral displays are genuinely striking, especially under UV light
  • Deep local and geological history tied to one of the richest mineral deposits on Earth

The Mine That Made Ogdensburg

Zinc came out of this hillside for a century and a half. Small companies started digging in 1836, the New Jersey Zinc Company consolidated the property in 1897, and the operation ran until 1986, eventually reaching 2,675 feet down through roughly 35 miles of tunnel before rising costs and falling zinc prices closed it for good. When Ogdensburg foreclosed on the land for back taxes, brothers Richard and Robert Hauck bought it at auction in 1989 and set about turning a dead mine into a museum. It was designated a National Historic Site in 1991. Everything below the water table is flooded now, so tours stay on the upper level, which is where the interesting rock is anyway.

What the Tour Includes

Plan on about two hours, all of it guided. There are no self-guided visits here: the mine and both museums are only accessible with a guide, which is part of why the experience holds up. The underground portion runs a quarter mile past mining equipment displays and a drilling and blasting demonstration, and ends at the Rainbow Tunnel, where the ore walls flare green and red under ultraviolet lamps. Everyone leaves with a fluorescent specimen of their own.

Flourescent minerals glow under UV lamps at the Sterling Hill Mining Museum in Ogdensburg, NJ
Flourescent minerals glow under UV lamps at the Sterling Hill Mining Museum in Ogdensburg, NJ

Above ground, Zobel Hall Museum gets about half an hour and the Warren Museum of Fluorescence another half hour. That second one holds the largest collection of fluorescent minerals anywhere on earth, which is a strange sentence to write about a borough of 2,400 people. The Franklin and Sterling Hill district has produced more than 350 mineral species, a handful of them found nowhere else. Rockhounds have been making the drive to Franklin and Ogdensburg for generations because of it.

Tickets and Timing

The main tour runs at 1:00 PM. Arrive between 12:30 and 12:45 to buy tickets, since there are no reservations and nothing is sold online. Adults are $15, seniors 65 and over $14, children 4 to 12 $13, and children under 4 are $5. Bring a sweatshirt: it is 56°F down there in August.

Making a Day of It

The gift shop and snack bar are open daily, and you can sluice for minerals, sift the water trough for fossils, or work the mine run dump if you are 18 or older and serious about collecting. The parking lot yard is a free self-guided walk through historic mining machinery. Mineral shows land in April and September, and the Ellis Astronomical Observatory hosts occasional viewing nights. Pair it with other Sussex County attractions or a stop in Ogdensburg and you have a full afternoon in northwestern New Jersey.

FAQ

Do you need a reservation for Sterling Hill Mining Museum?

No reservations are needed for the public tour, and tickets are not sold online. Buy them at the gift shop when you arrive, ideally between 12:30 and 12:45 PM for the 1:00 PM tour. Private group tours of 15 or more do require booking at least two weeks ahead.

How cold is it inside the Sterling Hill mine?

The mine stays at 56°F year round, no matter the weather outside. Bring a sweatshirt or light jacket even in the middle of summer, because the underground portion of the tour lasts roughly an hour.

Is Sterling Hill Mining Museum good for kids?

Yes, though it works best for school-age children rather than toddlers. Kids 4 to 12 pay $13, everyone takes home a fluorescent mineral, and the sluicing and fossil sifting outside are built for younger visitors. The underground walk is dark and about two hours long overall.

How long is the tour at Sterling Hill Mining Museum in Ogdensburg NJ?

The main guided tour runs about two hours total. That breaks down to roughly a half hour in Zobel Hall Museum, an hour underground in the mine, and a half hour in the Warren Museum of Fluorescence.

Can you collect minerals at Sterling Hill?

Yes, collecting is available on days the museum is open. The mine run dump is recommended for avid collectors 18 and older, while sluicing and sifting the water trough are the better options for children.

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