Flennikens Rapids is a stretch of rapids in Cascade County, Montana, in the Middle Rockies region. It lies about 29.8 miles southwest of Sun Prairie and roughly 33.3 miles southwest of Great Falls as the crow flies.
The Middle Rockies are high, glaciated mountain ranges with alpine peaks, subalpine fir and spruce forest, lodgepole pine and grassy intermontane valleys. Snowmelt streams cascade down glacial valleys and canyon walls.
Cascade County holds 4 recorded rapids, and several are close by. Lone Pine Rapids, is under a mile away. Brunots Rapids, is under a mile away. Pine Island Rapids, is about 1 miles away.
Flennikens Rapids is located at 47.1708° N, 111.8197° W. The listing is based on the USGS Geographic Names Information System, 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 rapid yet.