Richard Kresser proposed this bike & hike challenge:

Mount Lassen to Mount Baker in the Cascade Range

280 km trail from Kloten to Stenkällegården. 
http://bergslagsleden.se/

Big Loop (37 miles):  Starts at the Goose Creek Trailhead. Travel west on the Hankins Pass Trail. Head north on the Lake Park Trail and again on the Brookside-McCurdy Trail. Stay on this trail all the way to Lost Park. Then head east on the Wigwam trail. Then turn south onto the Goose Creek Trail. Stay on that trail until you reach the Goose Creek Trailhead. 37 miles.