The "Nasties" are routes in Forest Park, Portland.  Description from https://sites.google.com/site/runs4cache/: "Whereas Wildwood Trail is relatively flat and easy to follow, the "Nasties" are not. They were designed by a mysterious Portland trail runner for hilly off-season training while the volcanoes and high trails of the northwest are under snow and ice. It's believed he also has an intention to increase the suffering in the world."

Submitted by Vasy Komissarovv:

Russia, Murmansk region, Khibiny mountains.
Khibiny Crown - route along the 11 highest peaks of the mountain range. Start and finish in the city of Kirovsk. 120km D+6500. 

Submitted by Dmitry Postnov:

The outer loop of Mt Kineo State Park.  From the trail head, run the carriage trail to hardscrabble point. Get on the northern trail and run to the top of the firetower on the summit. take Indian trail to carriage road and back to trailhead.  5.5 miles.

Katahdin Woods and Water National Monument, Maine
A 19-mile lollipop loop, starting at Sandbank Stream campsite, run the loop road and return to campsite.