Marked by the massive bulk of Liberty Bell and Early Winters spires, Highway 20 — also known as the North Cascades Scenic Highway — is a designated byway located on the Cascade Loop. It is surrounded by jagged peaks and valleys, waterfalls and more than 300 glaciers within the North Cascades National Park. Several peaks rise well above 9,000 feet in elevation! Not surprisingly, hiking, climbing and camping are hugely popular here. (A nice perk about North Cascades National Park is that there is no entry fee, a rarity among national parks.) Get complete contact details for the North Cascades National Park inside the pullout map in this guide.
Continue onward and upward until you reach the brilliant turquoise-colored Ross and Diablo lakes. Views from these glacier-fed lakes reach north to Canada and south into the most-glaciated valley in North America outside of Alaska. Colonial Creek and Newhalem campgrounds offer the most vehicle-accessible campsites in the park with summer programs and ancient forest hikes.
The North Cascades Institute offers year-round, nature-based learning adventures for people of all ages at the North Cascades Environmental Learning Center (milepost 127.5). People interested in exploring and learning can participate in a variety of programs, including family getaways, art classes, natural history excursions and the popular Base Camp overnight learning and lodging program.
Near Newhalem, chat with park rangers, check out maps, exhibits, audio-visual displays, trails and viewpoints at the North Cascades National Park Visitor Center. Learn about local history and stretch your legs at the Skagit Information Center, nearby Ladder Creek Falls Trail, and the Trail of the Cedars (see permit info.)
Marblemount is the first full-service community you reach on the western slope of Highway 20. Rockport State Park offers numerous places to hike through forests with sweeping views of the Skagit River (see permit info.) The upper Skagit Valley supports a growing list of recreational experiences including fishing, camping, river rafting, snowmobiling, hiking and wildlife watching.
Next, continue west toward the Skagit Wild and Scenic River System, which includes the Cascade, Sauk and Suiattle rivers. These clean, rushing waters are home to five species of Pacific salmon, as well as two species of trout. Nearly 300 species of wildlife populate the area, including black-tailed deer, elk, black bear, bald eagle, great blue heron and osprey. High-mountain glaciers feed the Skagit watershed, flowing south from British Columbia to provide ideal conditions for migratory birds. Bird-watchers, this is a place where you’ll want to have your binoculars handy!
The historic town of Concrete was fittingly named when it served as a cement production center that supplied cement for neighboring Ross and Diablo dams. Start your day here with an epic cinnamon roll served up by the friendly staff at 5b’s Bakery. Then, for lunch or dinner, grab an award-winning slice of pizza, calzone or the signature cal-sub at Annie’s Pizza Station. Stroll the historic town center, visit the community garden, or get wet in the spray park at Silo Park.
Next Region: Skagit Valley & Fidalgo Island
Important Note About Winter
The North Cascades receive incredible amounts of snowfall each winter. Because of this abundant precipitation, Highway 20 will be closed from milepost 171 (west of Mazama) to milepost 134 (East of Diablo) each year, usually late November through late April. Check out the pass’s historic opening and closing dates at https://wsdot.wa.gov/travel/roads-bridges/mountain-pass-closure-and-opening-dates
North Cascades Visitor Services
This region is also home to its very own Scenic Byway, the North Cascades Scenic Byway, part of the Cascade Loop. Check out current conditions below:
Gold was discovered in the North Cascades in the late 1800s, but many miners were disillusioned and instead began logging in the Skagit and Stehekin valleys. Many who stayed became shopkeepers and supported needs of trappers and prospectors. A base for miners was established at Marblemount.
By the 1900s, people began to recognize that the North Cascades’ rivers had tremendous potential for hydropower. Major hydroelectric development of the Skagit River began in 1918. A railroad eventually linked Newhalem and Diablo, company towns built for employees of the Skagit River Hydroelectric Project. Diablo Dam was completed in 1930, Ross Dam in 1949, and Gorge Dam in 1961. President Lyndon B. Johnson signed a bill to establish the North Cascades National Park in 1968. In 1972, the modern road was built to traverse the North Cascades.
