Washington State white water river rafting on the Wenatchee, Skykomish, Tieton, and Skagit rivers outside of Leavenworth and Seattle, Washington. Alpine Adventures has been running whitewater river rafting trips for 17 years. The closest river to Seattle is the Skykomish river which has 2 different sections. The Skykomish River has a challenging upper whitewater section and a lower family float trip from Big Eddy to Sultan. Call now to get on our hot-list for the unforgettable Green River Get a pre-season deal if you book a trip now to come crashing through the huge waves on the Wenatchee River in the Bavarian town of Leavenworth. Guide your own inflatable kayak on the upper section from Lake Wenatchee to the town of Plain. Leavenworth outdoor activites include: whitewater rafting, kayaking, hiking, mountain biking, backpacking, rock climbing, inner tubing, swimming, camping, and shopping. Want an adventure that the whole family can enjoy. In the spectacular North Cascades National Park you can go river rafting on the emerald green waters of the Skagit River. No matter what your river fancy may be, Alpine Adventures is here for you, to make sure your day, overnight or multi-day sightseeing trip is the highlight of your vacation. Whitewater guide school Spring 2010. Guide Training.