Switzerland Trail, Gold Hill Site is a 5.7 mile lightly trafficked out and back trail located near Boulder, Colorado. The trail is rated as moderate and primarily used for hiking and mountain biking.
This is just a forest service road. It's an easy walk down with a few offshoot trails and nice valley views. It'd be a great mountain bike or dirt bike descent. Instead of going back up the road I cut up the slope which was about 30 minutes shorter. Very little wildlife (in fall) but also very few humans. Occasional Verizon signal.
Nice views but no shade. Probably better in early spring or fall.