When established: 1968
Visitors last year: Ross Lake National Recreation Area, which takes in the Highway 20 corridor, counted 725,917 recreation visitors in 2013. Lake Chelan National Recreation Area: 37,315 visitors. The national park itself — mostly wilderness — counted 21,623 visitors. Complex total: 784,855 in 2013.
How big: 684,000 acres in the total complex
How high, how low: High point is 9,220-foot Goode Mountain in the national park’s southern district. Low point: 400 feet along the Skagit River at the park’s western boundary.
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How deep: 1,486-foot-deep Lake Chelan is the nation’s third deepest lake (after Crater Lake and Lake Tahoe).
Trails: 400 miles
Wild things found here: 75 mammal species; around 21 species of reptiles and amphibians; roughly 200 species of birds; and at least 28 species of fish. Most often seen: Columbia black-tailed deer, Douglas squirrels and pikas. Rarer but out there: cougars, gray wolves and wolverines.
Number of glaciers: More than 300, more than any other park in the Lower 48 states.
Sources:National Park Service, National Parks Conservation Association