Lost Falls is a waterfall on North Fork Big Thompson River in Larimer County, Colorado, in the Southern Rockies region, with a total height of about 200 feet. It lies about 9.1 miles north of Estes Park and roughly 25.9 miles west of Fort Collins as the crow flies.
At 200 feet it stands in the tallest quarter of Colorado’s 162 waterfalls with a recorded height, ranking 30th; the typical Colorado waterfall is about 65 feet. The water comes down as a tiered waterfall, falling in several distinct steps one after another. It falls in 3 drops.
The Southern Rockies are high, rugged mountains with alpine peaks, spruce-fir and lodgepole forest, aspen groves and glacial valleys. Snowmelt drives strong spring flows over granite and volcanic cliffs.
There are 28 recorded waterfalls in Larimer County. Fox Creek Falls, a cascade waterfall, is about 4.3 miles away. Fall Creek Falls, is about 4.3 miles away. West Creek Falls, a 40-foot tiered waterfall, is about 4.5 miles away.
Lost Falls is located at 40.5038° N, 105.5668° 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.