Oregon Route 203

Oregon Route 203
Route information
Maintained by ODOT
Length:	49.23 mi (79.23 km)
Existed:	1935 – present
Major junctions
South end:	I-84 in Baker City
	OR 237 in Union
North end:	I-84 / US 30 in La Grande
Highway system
Oregon highways Routes • Highways ← OR 202 OR 204 →

Oregon Route 203 is an Oregon state highway running from Interstate 84 near La Grande to I-84 near Baker City. OR 203 is composed of part of the La Grande-Baker Highway No. 66 (see Oregon highways and routes) and the Medical Springs Highway No. 340. It is a combined 49.23 miles (79.23 km) long and runs north–south.

Route description

OR 203 begins at an intersection with I-84 and U.S. Route 30 near La Grande. It heads southeast through Hot Lake to Union, where it overlaps OR 237 for 0.58 miles (0.93 km). After the concurrency ends, OR 203 continues southeast to Medical Springs, then turns south, southwest, and west to an intersection with I-84 near Baker City, where it ends.

The official description of OR 203 indicates that it ends at an intersection with OR 86 near Baker City. Current Department of Transportation charts, however, suggest that this description is outdated.

History

Major intersections

Highway	Milepost	City	Intersection
La Grande-Baker	5.36	La Grande	Interstate 84 and U.S. Route 30
La Grande-Baker	15.93	Union	OR 237 (Begin concurrency)
La Grande-Baker / Medical Springs	16.51 / 0.00	Union	OR 237 (End concurrency)
Medical Springs	38.94	Baker City	I-84

OR 203 begins at milepost 5.36 and restarts mileposts at Union because Oregon numbers mileposts along highways.

Related routes

• I-84
• US 30
• OR 237
• OR 86

References

• Oregon Department of Transportation, Descriptions of US and Oregon Routes, http://www.oregon.gov/ODOT/HWY/TRAFFIC/TEOS_Publications/PDF/Descriptions_of_US_and_Oregon_Routes.pdf, page 17.
• Oregon Department of Transportation, La Grande-Baker Highway No. 66, ftp://ftp.odot.state.or.us/tdb/trandata/maps/slchart_pdfs_1980_to_2002/Hwy066_2002.pdf
• Oregon Department of Transportation, Medical Springs Highway No. 340,ftp://ftp.odot.state.or.us/tdb/trandata/maps/slchart_pdfs/Hwy340_SL_2006.pdf