One of the nation's largest urban wildernesses (5,000 acres), this city-owned, car-free park, has more than 50 species of birds and mammals and more than 70 miles of trails. Running the length of the park is the 24½-mile Wildwood Trail, which extends into Washington Park. The 11-mile Leif Erikson Drive, which picks up from the end of Northwest Thurman Street, is a popular place to jog or ride a mountain bike. Trail information and maps can be found at the Forest Park
Portland Audubon Society. The 150-acre sanctuary has 4.5 miles of trails, including one known for ample woodpecker sightings. 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 NW Cornell Rd., Forest Park, 97210. 503/292–6855. www.audubonportland.org. Trails daily dawn–dusk; Nature Store Mon.–Sat 10–6, Sun. 10–5.