12-Jun-2014 -- Driving south on I-15, south of Pocatello, Idaho, I exited the freeway at exit 17 to continue on Idaho route 36. After about 10 miles, this road continued through a picturesque canyon, lined with jagged, rocky peaks. (This scenic route would be worth taking even if you weren't visiting the confluence point.) Then, as I got closer to the confluence point, I reentered flat farmland, and took a series of dirt farm roads, leading closer to the point.
From looking at maps and satellite imagery beforehand, I knew that the confluence point lay on the western side of Bergeson Hill, which, at 5964 foot elevation, rises about 1500 feet above the surrounding (mostly flat) farmland. I knew that I needed to find a narrow dirt road that passed just east of the confluence point. I first tried to access this road from the northwest, with no luck. (I later discovered that the road does not really continue this way.) Eventually, I found the way to access the road - from the southeast, at [41.96391,-111.97916]. The road winds clockwise around the hill as it climbs, eventually crossing the state line into Idaho, and then passing just 260 feet east of the confluence point.
The confluence point lies down the steep west-facing hillside. The hillside was quite pretty at this time of the year, with abundant wildflowers growing.