-
Contact Us
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!
Follow Us
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 (Last Tour at 6:45 PM)
September: 9 AM – 6 PM (Last Tour at 4:45 PM)
October: 9 AM – 5 PM (Last Tour at 3:45 PM)
November – February: Open by Reservation Only