2020 Map of Little Lost River Sinks

About this map

The Little Lost River Valley forms the central geographic feature of this Idaho landscape, where the waters of the Little Lost River eventually reach the Little Lost River Sinks. This endorheic drainage pattern is a defining characteristic of the region, mirrored in the southeast by the Big Lost River Sinks where the Big Lost River terminates. The terrain is bounded to the northeast by the rising slopes of the Lemhi Range, which provides a sharp contrast to the flat basin floor below.