Mon-Thurs 8AM-5PM , Fri 8AM-2PM  |  605-342-5630  |  810 Quincy Street Rapid City, SD 57701

Rapid City Office

East of Black Hills National Forest in western South Dakota. It’s known as a gateway to Mt. Rushmore.
810 Quincy StreetRapid City, SD 57701
Phone: (605) 342-5630
Fax: (605) 342-2172

Spearfish Office

Located in the northern Black Hills, Spearfish is a year-round playground for outdoor adventure.
123 E. Jackson Blvd Suite 2 Spearfish, SD 57783
Phone: (605) 642-7676
Fax: (605) 642-2616

Custer Office

Minutes-not miles-from the best climbs, trails and family fun of the Black Hills. Home of Custer State Park.
609 Mt. Rushmore Road Custer, SD 57730
Phone: (605) 673-3220
Fax: (605) 673-3114

Gillette Office

Sprawling across the northeast corner of Wyoming, a land of rolling hills, sagebrush-covered plains and historic western towns.
305 S. Garner Lake Rd Suite A Gillette, WY 82718
Phone: (307) 685-4433
Fax: (307) 682-6321

Have questions? Reach out and let us know what you want to learn more about.

You’re not going to hit a ridiculously long phone menu when you call us. Your email isn’t going to the inbox abyss, never to be seen or heard from again. At Ketel Thorstenson, we provide the exceptional service we’d want to experience ourselves!

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online payments

If you would like to pay an invoice online with a credit card click on the Pay Now button.  Pay_Now_button

You also have the option to pay your invoice electronically via ACH (bank to bank transfer) at no cost to you by completing the ACH form and returning it to your accountant.


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