Sofia in Bulgaria has an extensive network of forest parks close to the city centre.

This route links four of the main parks and almost exclusively keeps you away from main roads.

Grandjean Sawtooth Lake Loop is a 20.4 mile moderately trafficked loop trail located near Lowman, Idaho. The trail goes from Grandjean Campground along Trail Creek, loops up around Sawtooth lake via the North Fork Baron-Sawtooth Lake trail, before turning back towards Grandjean trailhead along Baron Creek. A fun loop only a couple hours outside of Boise. 

The Heart of Darkness Loop (aka Ochoco Mountains Loop) is a 38 mile route off the beaten path in Central Oregon's Ochoco Mountains National Forest. The route links the Ochoco Mountain Trail #823, the Payten Trail #820D, the Black Canyon Trail #820, and the Owl Creek Trail #820A. Spanish Peak (6,871ft), one of the 8 highest peaks in the Ochoco mountains, is just a short distance off the route.