One of the nation's largest urban wildernesses (5,170 acres), this city-owned, car-free park has more than 50 species of birds and mammals and more than 80 miles of trails through forests of Douglas fir, hemlock, and cedar. Running the length of the park is the 30-mile Wildwood Trail, which extends into adjoining Washington Park (and is a handy point for accessing Forest Park), starting at the Vietnam Veteran's Memorial in Hoyt Arboretum. You can access a number of spur trails from the Wildwood Trail, including the 11-mile Leif Erikson Drive, which picks up from the end of Northwest Thurman Street and is a popular route for jogging and mountain biking. You can find information and maps at the Forest Park Conservancy office and website.
Portland Audubon Society. The 150-acre sanctuary has a few miles of trails, including one known for ample woodpecker sightings, as well as access to the miles of trails in the adjoining Forest Park. There's also a hospital for injured and
orphaned birds here, as well as a gift shop stocked with books and feeders. The society supplies free maps and sponsors a flock of bird-related activities, including guided bird-watching events. 5151 N.W. Cornell Rd., Forest Park, Northwest, 97210. 503/292–6855. www.audubonportland.org. Trails daily dawn–dusk; Nature Store Mon.–Sat 10–6, Sun. 10–5.