It connects Decatur to Kingston via SR 68 and Ten Mile.

It provides access to many marinas and lakeside homes along Watts Bar Lake.

[2] SR 304 begins in Meigs County in Decatur at SR 58 and heads north and after 2.4 miles it begins to follow closely to the Tennessee River and Chickamauga Lake (and past Watts Bar Dam, Watts Bar Lake).

SR 304 again begins to follow closely to the Tennessee River and enters the community of Ten Mile and passes some businesses, marinas and the community's post office.

It then leaves the river for a short distance and enters Roane County and continues to follow the river, until it comes to an end at SR 58 south of Kingston and north of Ten Mile.