Terwilliger Falls is a waterfall on South Fork Rider Creek in Lane County, Oregon, in the Cascades region, with a total height of about 100 feet. It lies about 25.7 miles northeast of Oakridge and roughly 39.2 miles east of Springfield as the crow flies.
At 100 feet it stands in the tallest quarter of Oregon’s 425 waterfalls with a recorded height, ranking 106th; the typical Oregon waterfall is about 54 feet. The water comes down as a plunge, where the water drops vertically and loses contact with the rock face.
The Cascades are a high volcanic range of snow-capped peaks, deep glacial valleys and dense conifer forest of Douglas fir, western hemlock and true firs, with abundant rain and snow on the western slopes. Basalt cliffs and lava flows give the region one of the highest concentrations of waterfalls in the country.
There are 163 recorded waterfalls in Lane County. Rider Creek Falls, 45 feet high, is under a mile away. Unnamed waterfall on Annie Creek, 40 feet high, is about 1.1 miles away. Unnamed waterfall on Annie Creek, 60 feet high, is about 1.2 miles away.
Terwilliger Falls is located at 44.0809° N, 122.2346° 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.