State Route 236 (SR 236) is a state highway in the U.S. state of California. It is a short 18-mile (29 km) "C" shaped highway that links to State Route 9 at both ends in the Santa Cruz Mountains. 236 links Route 9 with Governor's Camp in Big Basin State Park near the Waterman Gap.

Route 236 begins in the town of Boulder Creek. Several sections of the road are less than two lanes wide and large vehicles are discouraged from traveling this road. The reason for the narrow road is to not disturb the large redwood trees that the road passes by in the densely forested lowlands.

SR 236 begins with an at-grade intersection with SR 9 within the small town of Boulder Creek. The road then heads northwestward through an area of evergreen forest, exiting the town. After several switchbacks, the route heads westward into Big Basin Redwoods State Park, where its name is Big Basin Highway. Amidst the park, the road turns abruptly toward the north, where it continues winding through the forest. As it exits the park, the road abruptly turns eastward again, heading again toward SR 9, where it meets its northern terminus.

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, and do not necessarily reflect current mileage. The entire route is in Santa Cruz County.