The historic <a href="https://en.wikipedia.org/wiki/Mullan_Road" class="extiw" title="en:Mullan Road">Mullan Road</a> connected Fort Benton (Montana) to <a href="https://en.wikipedia.org/wiki/Fort_Walla_Walla" class="extiw" title="en:Fort Walla Walla">Fort Walla Walla</a> (Washington). The segment of the road at Fourth of July Pass, <a href="https://en.wikipedia.org/wiki/Idaho" class="extiw" title="en:Idaho">Idaho</a>, is listed on the US <a href="https://en.wikipedia.org/wiki/National_Register_of_Historic_Places" class="extiw" title="en:National Register of Historic Places">National Register of Historic Places</a>.
<a href="//commons.wikimedia.org/wiki/User:Ipoellet" title="User:Ipoellet">Ian Poellet</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>