5.2 miles & 2,000 feet
This is about half-way up the mountain, so around 2,400 feet. From here you can see the ocean, and most of the coastal range.
If you look closely at the photos below you can see tiny specks of people walking up the trail. It's easily the steepest, hardest trail I've ever hiked. The trail is even covered in fencing to hold the rocks in place and give traction. From the top you can see the ocean, the columbia river and all five of the closest snow-capped mountains (Mount Hood, Mount Jefferson, Mount Saint Helens, Mount Adams and Mount Rainier.)