- Western Terminus:
- Seven Lakes Drive and Arden Valley Road at Tiorati Circle in Harriman State Park
- Eastern Terminus:
- Lake Welch Drive in Harriman State Park
- Orange, Rockland
Tiorati Brook Road is a short east/west route located in Harriman State Park. It begins at Tiorati Circle along Seven Lakes Drive by Lake Tiorati. It goes around the north and east sides of the lake before turning east to follow Lake Tiorati Brook. It merges into Lake Welch Drive right before its eastern terminus at the Palisades Parkway. The entire length is a two-lane undivided road.
Tiorati Brook Road is maintained by the Palisades Interstate Park Commission. Therefore, it has no route number, not even a reference route. However, it is signed (albeit sparsely) with the same style of parkway signage used for the other parkways in Harriman State Park.