21-May-2013 -- Heading north from Twin Falls through the town of Shoshone, I approached this confluence point from the northwest, from US-93, rather than from the south (from State Road 24), as the previous visitor (Woody Harrell, in 2003) did. The road - Owinza Desert Road - was winding, sandy, and (in places) rocky, but was easily manageable by my 4WD SUV. (I don't recommend driving on this road with anything other than a 4WD vehicle, though.)
The road passes 0.8 miles from the confluence point. From there, it was an easy hike across undulating terrain. The recent (in geologic terms) volcanic activity in this area was immediately evident; this whole area is a sagebrush desert, sitting atop a lava field.