Here is my video trip report from August 11, 2012 of Sauk Mountain in Skagit County, WA.  This is a relativaly easy hike (less than 2 miles, about 1,200 ft. of gain) and is right off of Highway 20 near Concrete, WA.  If you're traveling over the Cascade Pass, it's a must do.  Be aware that it's a very popular hike.