Sterk Financial Services Share: Investment AdvisorDakota Valley Business Council Members Sterk Financial Services Visit Website 350 Oak Tree Ln Ste. 150 Dakota Dunes, SD 57049 (605) 217-3555 (605) 217-3535 (fax) About Map About Advice you can trust. It's not about what we can sell you, it's about clear direction and smart strategies. It's about explaining things in a way that educates you and is easy to understand. What's Nearby? Distance: 5 10 15 20 25 50 mi.