U.S. Route 830

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U.S. Route 830
Number based on

US 30

Length:

209 mi^[1] (336 km)

Formed:

1926^[1]

Decomd.:

1968^[1]

West end:

US 101 in Johnson's Landing

East end:

US 97 in Maryhill

Washington State Routes
< US 730		US 2 >

U.S. Route 830, or US 830, is a now-decommissioned U.S. Highway which ran between a junction with U.S. Highway 97 near the city of Maryhill, Washington and a junction with U.S. Route 101 near Ilwaco, Washington. The route still (mostly) exists; however it is currently signed as Washington State Route 14 between Marysville and Vancouver, Washington, Interstate 5 between Vancouver and Longview, Washington State Route 432 for a short stretch through Longview; and Washington State Route 4 from Longview to the western terminus near Ilwaco.

When it existed; US-830 was the highest numbered route in the U.S. Highway system (and remains the highest U.S. route number ever used). The highest numbered route still in existence is U.S. Highway 730.

The number suggests that U.S. 830 was a spur route of U.S. Highway 30. While 830 and 30 never connect, they ran parallel to each other for the entire length of U.S. 830. 830 ran on the northern bank of the Columbia River (through Washington) whereas U.S. 30 runs on the river's southern bank, through Oregon.

The stretch of (former) U.S. 830 which is now Interstate 5 was at one point co-signed with U.S. Highway 99. The stretch of 830 between Maryhill and Dallesport, Washington was formerly co-signed with U.S. Highway 197; now Dallesport is the northern terminus of 197.