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604 Blair Street | Keystone, SD 57751 - (605) 666-4847
Now open 9:00-5:00 seven days a week!
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Connect with the Big Thunder Gold Mine Team

Big Thunder Gold Mine in Keystone, South Dakota strives to provide our visitors with the highest level of service possible and proud to accommodate your unique needs. Should you have any questions about our service selection, reserving a tour or adventure, or other service-related questions, we encourage you to check out our Frequently Asked Questions (FAQ) page.

Should you be unable to find the information you are looking for or have any immediate concerns to bring to our attention, please give us a call at 605-666-4847, or fill out our Contact form below and we’ll work to get back to you as soon as we can!

Our Address

604 Blair Street

Keystone, SD 57751

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Our Phone

Office Telephone: 605-666-4847

Office Fax: 605-666-4566

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Seasonal Hours

(Open Daily, Second Week of March – October)

March: 10 AM - 4 PM (Thursday Through Sunday, Beginning Second Weekend)

April: 9 AM – 5 PM

May: 9 AM – 6 PM

June: 8 AM – 8 PM

July: 8 AM – 8 PM

August: 8 AM – 8 PM

September: 9 AM – 6 PM

October: 9 AM – 5 PM

November – February: Open by Reservation Only


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