Biking--Riding off the road is not allowed in the park, but there are still several good biking routes. Keep in mind that biking is usually best in late July and August, but even then, bad weather can descend suddenly to ruin the views and soak the riders.
The trip along Wash. 20 through the park and also west of the park between Rockport and Marblemount is strenuous but beautiful. The road has a wide shoulder in many (though not all) places and developed campgrounds. There are some extremely steep stretches.
Mountain bikers will want to try the Stehekin Valley Road route, a 21-mile stretch from the community of Stehekin to Flat Creek, on Lake Chelan. The road parallels the glacier-fed Stehekin River and provides plenty of great views of the North Cascades peaks. The 312-foot-high Rainbow Falls is a wonderful stop along the way.
