The roadway parallels a railroad line before it terminates in South Cle Elum.

The highway continues through Ronald before terminating at the boundary of the Wenatchee National Forest, east of Cle Elum Lake.

[2] The Washington State Department of Transportation (WSDOT) measures traffic counts, measured in terms of annual average daily traffic, with as few as 1,100 cars at the northern terminus, and as many as 7,400 cars just past the intersection at Pennsylvania Avenue in Roslyn.

[9] The roundabout at Bullfrog was first proposed in 2002,[10] and was estimated to cost $1.2 million, paid for by Suncadia Resort.

[12] Completed in August 2007, WSDOT repaved 8.1 mi (13.0 km) of highway between Cle Elum and the National Forest boundary for a cost of $2 million.