Upper Thunder Basin Falls is a waterfall in Chelan County, Washington, in the North Cascades region. It lies about 29.6 miles southeast of Darrington and roughly 53.1 miles east of Marysville as the crow flies.
Its height has not been recorded in the source data.
The North Cascades are a wilderness of jagged peaks, glaciers and deep, forested valleys of western hemlock, silver fir and Douglas fir, with some of the heaviest snowfall in the country. Meltwater from glaciers and snowfields pours down thousands of feet of cliffs in countless cascades and horsetail falls.
Chelan County holds 183 recorded waterfalls, and several are close by. Thunder Basin Falls, is under a mile away. Waterfall 30 mi SE of Darrington, is about 1 mile away. Waterfall 31 mi SE of Darrington, is about 1.7 miles away.
Upper Thunder Basin Falls is located at 48.0643° N, 121.0272° W. The listing is based on the World Waterfall Database, one of the sources compiled by the U.S. Geological Survey in its inventory of waterfalls and rapids of the conterminous United States. The exact position has not yet been verified on aerial imagery, so treat the map pin as approximate. Details on trails, parking and access have not been documented for this waterfall yet.