The county's eastern border with Beaverhead County, Montana, is the continental divide.
Hybrids with S. bebbiana are known from Montana (collected from Beaverhead County); those with S. pedicellaris are known from Washington; and those with S. irrorata and S. ligulifolia are known from Arizona.
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Constructed in 1909 and 1910 between the towns of Armstead, Montana and Salmon, Idaho, the G&P served mining and agricultural areas in Lemhi County, Idaho and Beaverhead County, Montana.
The Strothers now reside in Bozeman, Montana, and have a home on the Big Hole River near the unincorporated community of Wise River in Beaverhead County near Dillon, Montana.