Alpine wilderness.
http://www.fs.fed.us/r6/mbs/
A tough hike basically straight up the side of a mountain from its base to peak. Elevation gain is 1250 m. The trail is initially forested until about the top 1500 m which are above the tree line. The mountain is also a perfect pyramid and is the first major peak on the edge of the range. All this adds up to amazing, distant, 360-degree views.
A challenging alpine ascent to the summit of the stratovolcano Mt Baker - a perfect mountain to learn basic alpining techniques.