Leif Erikson Drive, a wide dirt and gravel trail, travels through Forest Park, one of the largest urban forest reserves in the country. Right in Portland, this route feels as though it is in the wilderness away from urban life. The road is nicely graded and provides a pretty smooth surface. There are rocky sections and some short climbs, but Leif Erikson provides a pleasant outing for a great ride. This is a popular park and weekends can be busy.