A good ride for a beginer on a Mt. or cross bike. There is some good single track on side trails but most are closed to bikes. The people of Portland make a stink when they find you ridding them so watch out . Fire lane # 1 and # 3 are great down hills but are short. You can shuttle them if you have a car or truck.
Review: Leif Erikson itself is just an easy, wide lane ride that gives you the feeling of being deep in a NW forest while being only out of the city center. A cool feeling if you're new to the area. But the real appeal of the this ride is finding the small Fire lane trails which are legal for bikes and offer a heart-stopping workout if ridden uphill. For those who like downhill, I guess there are easy ways to approach these Fire lanes from above so you don't have to do the uphill (check the posted maps to plan you route). I've ridden three different fire lanes, but there are more. Starting form Thurman St. the first is just past Mile marker 3, the second is just past Mile marker 4. The other is past Mile marker 6 past a crossroads of Salzman and Leif Erikson intersect. That ones too hard to describe finding. You'll just have to search for yourself.