The state trunk highway system includes the following in Lyman County:

From a point on Interstate Highway 90 south of Kennebec north of the southeast corner of section eighteen, township one hundred five north, range seventy–five west, thence north via Kennebec to State Highway 1806 near the northeast corner of section eighteen, township one hundred seven north, range seventy–five west.

Source: SL 1984, ch 209, § 101.