Trail Factor 50k
The annual Trail Factor 50k run is a classic ultra that takes place in Portland's Forest Park. If you like trails, tranquil forest scenery, and challenging yourself with some elevation then you'll want to consider adding this run to your yearly "to do's."
This race does tend to have a limited field, and sells out quite quickly each year so keep an eye on registration dates in order to secure yourself a spot.
The Trail Factor 50k course is a looped route entirely contined within Forest Park. Runners run sections of the Wildwood trail, as well as a number of other trails for the duration of the race. Prepare for hills as the total elevation gain for the course is around 4,900 feet, and expect to be shaded by trees for most of the race.
There are not too many technical sections to this race, but you will run into some single track for sections of the event.