Idaho State Highway 8

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State Highway 8 marker

State Highway 8
Route information
Maintained by ITD
Length: 53.589 mi[1][2] (86.243 km)
Major junctions
West end: SR 270 in Moscow
  US-95 in Moscow
SH-99 in Troy
SH-9 near Deary
SH-3 in Deary
SH-3 in Bovill
East end: 1st Street and Main Street in Elk River
Highway system

State Highways in Idaho

SH-7 SH-9

State Highway 8 is an Idaho state highway in Latah and Clearwater counties, running from the Washington state line in Moscow to Elk River. It is 53.589 miles (86.24 km) in length, and runs primarily east–west.

Route description[edit]

SH-8 begins at the Washington state line, connecting with Washington State Route 270 to Pullman. Between the cities to the north is the Pullman-Moscow Regional Airport. The two state highways comprise the "Moscow-Pullman Highway" in the 8 miles (13 km) between the two university cities.

In Moscow, Highway 8 runs east along the northern boundary of the University of Idaho campus and becomes Third Street. It briefly overlaps US 95, and runs south through the city center. South of downtown Moscow, SH-8 branches east to become the "Troy Highway" and heads out to Troy, where it intersects SH-99. East of Troy, SH-8 heads generally northeast, intersecting SH-9 shortly before entering Deary and overlapping SH-3 in Deary. From Deary, the overlapping highways run east and northeast to Bovill, where they diverge.[1][2][3]

From Bovill, SH-8 heads south and southeast into Clearwater County. It then turns east and northeast into Elk River, where it ends at the intersection of 1st and Main Streets.[1]

Associated trails[edit]

For non-motorized traffic, Highway 8 is paralleled to the south by a series of paved trails from the state line to Troy, on former railroad corridors. The Bill Chipman Palouse Trail originates in Pullman and terminates a mile into Idaho at Perimeter Road.[4] There it links with the Paradise Path, which runs along the north and east edges of the UI campus and connects to the Latah Trail in southeast Moscow.[5][6]


Major intersections[edit]

County Location Mile[1][2][3] Destinations Notes
Latah Moscow 0.00 SR 270 – Pullman Western terminus, Washington state line, continuation into Washington
1.797-1.917 US-95 Begin overlap
2.331 US-95 End overlap
Troy 14.572 SH-99
Deary 25.549 SH-9
26.317 SH-3 Begin overlap
Bovill 36.310 SH-3 End overlap
Clearwater Elk River 53.589 1st and Main Streets Eastern terminus


  1. ^ a b c d Idaho Transportation Department (November 26, 2008). "Milepost Log". Retrieved 2008-12-28. 
  2. ^ a b c Idaho Transportation Department (November 26, 2008). "Milepost Log, U.S. Route 95". Retrieved 2008-12-28. 
  3. ^ a b Idaho Transportation Department (November 26, 2008). "Milepost Log, SH-3". Retrieved 2008-12-28. 
  4. ^ "Map: Bill Chipman Palouse Trail". Whitman County Parks and Recreation. Retrieved September 1, 2012. 
  5. ^ "Latah Trail". Latah Trail Foundation. Retrieved September 1, 2012. 
  6. ^ "Parks and Trails". Latah County Parks & Recreation. Retrieved September 1, 2012.