From US-18, Bonesteel to State Hwy 1806, Burke, Gregory County, South Dakota
28.36 mi
Length
1,719 ft
Elev gain
1,680 ft
Elev loss
2,031 ft
Max elevation
gravel 80%
pavement 20%

Elevation Click the profile for Street View

Named for Lewis and Clark's return route in 1806, this gravel road is paved at either end, and makes a steep decent through some wild bluff country to the SD Whetstone Bay campground, then climbs back out. Marked route ends at pavement, but you can continue on Hwy. 1806 all the way to SD Hwy. 44.
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