The northern section of this Portland City park borders on the Oregon Health Sciences University Campus off of Sam Jackson Parkway and Terwilliger Boulevard and encompasses two ravines on the slopes of Marquam Hill. In addition, a large swath of steep hillside in the southern Sentinel Hill sector of Marquam Nature Park remained undeveloped over the decades, except for the through route of the Marquam Trail, and was criss-crossed by a network of user paths that often contributed to erosion. As of 2014, an official new trail network has been in place, allowing for an up and down loop from either the Marquam Nature Park Shelter Trailhead or the Marquam Trailhead on Terwilliger Boulevard.

Other Information
Distance - Round Trip 5 miles
Expected Duration Car to car in one day
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