Location: SD-20 and SD-79, Harding Cty Reassurance shield as 79 joins 20. Location: SD-20 and Rocky Ridge Pl, Reva, Harding Cty A mile or so later, we’ll pass by Reva. Location: SD-20 and SD-79, Harding Cty Four miles later, 79 will split to head north. Location: SD-20 and SD-79, Harding Cty Follow 79 north to … Continue reading South Dakota Highway 20, SD-79 to SD-79