Press/Publications/RadioAdvertising/PromotionsCommunicationsMarketingPrinting & Typesetting Services Black Hills Pioneer Visit Website Request Info 315 Seaton Cir. Spearfish, SD 57783 (605) 642-2761 http://www.bhpioneer.com/ Facebook Hours: 8:00AM - 5:00PM . About Map About The Pioneer is the oldest business in West River South Dakota and the only locally owned newspaper in the territory.