Go white-water rafting on the Skykomish, Wenatchee, Methow and Skagit Rivers with Outdoor Adventure Center
Rock climb or boulder on the world-renowned Index Town Wall, Leavenworth’s Icicle River Valley, Mazama’s Fun Wall OR go indoors at Wenatchee's Riverfront Rock Gym
Hike into amazing waterfalls: Wallace Falls in Gold Bar, Bridal Veil Falls near Index, Deception Falls on Stevens Pass, Silver Falls in Entiat and Rainbow Falls in off-the-grid Stehekin (accessible via Lady of the Lake or Lake Chelan Helicopters), Ladder Creek Falls, and Gorge Creek Falls in the North Cascades
Day hike in literally any region on the Loop
Paddleboard in the Puget Sound near Everett, Anacortes or Whidbey Island, in the Wenatchee River near Leavenworth, in Wenatchee's Walla Walla Point Park River Estuary, in Lake Chelan, in the Methow Valley's Patterson Lake, Pearagin Lake or the Methow River, or even in the icy waters of Diablo Lake in the North Cascades National Park.