<p>The <strong>Chamberlain, Spearfish, Valley Springs, Vermillion</strong>&nbsp;and <strong>Wilmot</strong>&nbsp;locations open for the 2026 season on <strong>Monday, May 18</strong>.</p><p>The Wilmot, Spearfish, Valley Springs and Vermillion&nbsp;locations close Sunday, September 27, and the Chamberlain location closes Sunday, October 18.&nbsp;</p><p><a href="https://sdvisit.com/training-hospitality/interstate-welcome-centers">Mo… information</a></p>