 SR 42 continues the east-northeasterly path of SR 91 through the valleys formed by the North Fork Holston River, crossing State Route 16 at Black Hill.SR 42 continues past Groseclose Store and Ceres, meeting State Route 623 at Sharon Springs, the source of the North Fork Holston River.A low crossing of the Tennessee Valley Divide at about 2850 feet (869 m) takes SR 42 into the valleys formed by Walker Creek.