In 1968, six southwest Portland neighbors met to discuss their concerns about the impending development of a 600-unit apartment building in Marquam Ravine. The neighbors organized a successful campaign against its construction, coming together to form Friends of Marquam Nature Park. In 1983, Marquam Nature Park celebrated its opening day and dedication. By 1989, the ownership of the property was transferred from the Friends of Marquam Nature Park to Portland Parks & Recreation, though the "Friends" continue to be dedicated stewards of the land.

Marquam Nature Park is a retreat from Portland's urban environment, an opportunity to walk in a natural oasis within the city. The 178-acre park has several trailheads, making it more accessible by car, bicycle, and mass transit. The park is also a critical piece in the 40-Mile Loop, a trail system first envisioned by the Olmsted Brothers in 1903.
 
The park supports an abundance of native plant species and contains many trails that wind around Marquam Hill, through forests of Douglas fir, western hemlock, red cedar, and bigleaf maples. There is an information kiosk with interpretive displays and maps near the main entrance. The park includes few built facilities, apart from a shelter, wooden stairs, and bridges that accompany the trails.