A post from Elaine:
Several bridges span the Fraser River, with one notably called the Alexandra Bridge. The devastation of the pine beetle is made obvious by the large brown patches on the hillsides. The affected trees are killed and turn brown … eventually becoming dead stumps. With the predominance of pine trees, this is a serious problem.
Because the road winds between steep canyon walls, there is a problem with falling rocks and, in winter, avalanches. To mitigate the danger, huge sheets of wire net cover rocky outcrops, sturdy concrete walls are built, and tunnels. Some of these are quite long.
The sheer hillsides, almost vertical in places, are covered in pine trees, which somehow manage to root precariously in the rocks. There appears to be no soil at all for them to find, and the fact that they grow is almost miraculous.