Upper Lilliwawup Creek is an 83-foot waterfall on Lilliwaup Creek in Mason County, Washington, in the Puget Lowland region. It lies about 13.8 miles west of Belfair and roughly 31.2 miles north of Olympia as the crow flies.
At 83 feet it is taller than the typical Washington waterfall of about 82 feet, ranking 465th of 941 with a recorded height. The tallest single drop is 60 feet. By form it is a tiered waterfall, falling in several distinct steps one after another, combined with a horsetail character. It falls in 2 drops.
The Puget Lowland is a glacially shaped basin of low hills, lakes and wetlands between the Olympics and the Cascades, once covered by Douglas fir and western red cedar and now the most settled part of Washington. Streams here run through terraces of glacial till and outwash, with waterfalls where creeks cut through the deposits. Lilliwaup Creek carries 2 recorded waterfalls; the biggest of them reaches 142 feet.
Mason County holds 42 recorded waterfalls, and several are close by. Lilliwaup Falls, a 142-foot tiered horsetail waterfall, is under a mile away. Sund Creek Falls, is about 2 miles away. Miller Creek Falls, is about 3 miles away.
Upper Lilliwawup Creek is located at 47.4715° N, 123.1206° 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 creek name is confirmed against the federal Geographic Names Information System. 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.