Cape Horn Trail is an eight-mile trail in Skamania County located twenty-six miles east of Vancouver, WA. GreenWorks is providing services for the US Forest Service for improvements to an existing trail, which has two at grade crossings where hikers and horseback riders traverse the heavily traveled State Route 14. To improve safety for trail users, the Forest Service and WSDOT are constructing pedestrian underpass tunnels at these two crossings. GreenWorks developed schematic designs for the tunnel entrances and provided construction design drawings for the tunnel fascias, which include stonewall construction, custom metal guardrail fencing design and planting design around the entrances. The design of the tunnel fascias incorporate locally quarried Columbia River Basalt to form walls that echo other examples of historic basalt stone work in the Columbia Gorge.