The Way Western trailhead: From Marblemount, go 39 miles west on WA 20. Turn right on WA 9 N. In 22 miles, turn right on WA 542 E. In 32 miles, bear left on NFD 32. Go 5.3 miles to trailhead. Eastern trailhead: From Marblemount, drive east on WA 20. In .9 mile, turn left on WA 20 and go 28 miles.
Route Connect Hannegan Pass, Copper Ridge, Chilliwack, Brush Creek, Little Beaver, Big Beaver Trails. Camp at Egg Lake, Indian Creek, Whatcom, Luna.
Shuttle Ross Dam to Hannegan Campground. Mountain Transporter, $425 (up to four people), (509) 996-8294; methownet.com/mountaintransporter.html
Water taxi Go from Big Beaver to Ross Dam with Ross Lake Resort, $50 (up to six people), (206) 386-4437; rosslakeresort.com
Season The park is open year-round, but the best months for hiking are May through October.
Maps USGS quads: Mt. Sefrit, Mt. Shuksan, Copper Mountain, Mt. Blum, Mt. Challenger, Mt. Prophet, and Pumpkin Mountain ($8 each, store.usgs.gov)
Permit Required; free
Contact (360) 854-7245; nps.gov/noca
Trip data Get the track and print maps at backpacker.com/hikes/coppertraverse