High Quality Content by WIKIPEDIA articles! State Route 903 (SR 903) is a 10.06-mile (16.19 km) long state highway located entirely in Kittitas County, Washington, United States. The highway links Lake Cle Elum to Roslyn, Cle Elum and SR 970, which provides access to Interstate 90. The highway has existed as a numbered highway since at least 1939, however a highway linking Lake Cle Elum to Cle Elum has existed since 1897. The Washington State Department of Transportation (WSDOT) had previously considered turning control of the highway over to Kittitas County, however this never happened, and WSDOT continues to maintain the highway.