It carries Business Loop I-70 along Main Street in Green River.

SR-19 begins at an interchange with I-70 west of Green River and then heads east through the center of town and turns south through the Utah Launch Complex of White Sands Missile Range.

[1] The main road through Green River was added to the state highway system in 1912[2] and numbered as part of US-50 in the 1920s.

[4] Construction had begun in the mid-1980s, and when finished, the old route, along with a new connection to exit 164, became SR-19.

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