The Switchbacks

The new Sunset Highway eliminated the steep grades on the route. Some of these were 25% grades. On the Western side of Snoqualmie Pass, switchbacks were constructed to ease the steepness. Because of the steepness, 3 switchbacks were needed. 

The Middle Switchback it the most popular of the 3 because it has the best views and a great place for photos. 

Only the west corner of the upper switchback remains. The 1926 highway and now the freeway have covered up most of it. NF-58 or the 1915 highway was straightened out in this section to remove the need for this switchback.

You can beat the brush and walk into the forest to see the remaining curve. This remaining piece is visible from the satellite.