Tiorati Brook Road begins at Tiorati Circle, a
traffic circle at the north end of Lake Tiorati in
Harriman State Park. Here, the road connects to
Seven Lakes Drive and the eastern terminus of
Arden Valley Road. The highway heads southeast from the junction, running along the northeastern edge of Lake Tiorati as it passes by the dense forests that comprise most of Harriman State Park. Past the workshop, the road takes on a more southerly routing and descends down a hill before crossing Tiorati Brook by way of a dam. Just south of the dam is Day Camp in the Park, where Tiorati Brook Road turns back to the east to follow its namesake waterway away from the lake. For the next , the highway meanders southeastward across the park's sprawling forests, intersecting no other roads of note. During this stretch, the road passes from
Orange County to
Rockland County. It eventually ends at a wye interchange with
Lake Welch Parkway, where the road merges into the northbound direction of the parkway. The southbound connection is made by way of a northbound to southbound
U-turn a short distance to the east. The interchange lies just west of Lake Welch Parkway's northern terminus at
Palisades Interstate Parkway exit 16, a partial interchange lacking a connection between Lake Welch Parkway northbound and Palisades Parkway northbound. ==History==