By many accounts, Post Canyon has some of the most radical freeride action in the northwest. Because it is not on more regulated national forest land, locals were able to build extensive wooden features. The first mile and a half or so are on private land. Then it turns into State Park land and at the upper end it is Hood River County Forest land.
The lower section climbs gradually along a small meandering stream crossing back and forth over it 7 times, (which is how the "Seven Streams" trail got it's name). Up top, there are mind blowing wooden stunts built for experts, and a really fun practice area for learning called "Family Man". After the climbing effort is over, your reward is 4 miles of smooth, twisty, screaming single-track all the way home.
You can ride Post Canyon as an out & back, or connect up several trails to make a super fun loop ride. It rides best clockwise.