It begins at an intersection with NY 133 in the village of Ossining and heads northeast to the hamlet of Kitchawan, located adjacent to the New Croton Reservoir in the town of Yorktown.

Just past the cemetery, the highway changes names to Hawkes Avenue as it leaves the village for other parts of the town of Ossining.

For a short distance after the interchange, NY 134 becomes four lanes as the road serves IBM's Thomas J. Watson Research Center.

It narrows to two lanes past the facility, from where the highway takes a slightly more easterly track across Yorktown to reach the Kitchawan Preserve on the southern edge of the New Croton Reservoir.

[4] From Pines Bridge Road, NY 134 bends southward to run alongside a reservoir inlet connecting to Cornell Brook.

[2] In 1960, a new interchange was built between NY 134 and the Taconic State Parkway as part of the construction of IBM's Thomas J. Watson Research Center.