State Route 99 (SR 99) is part of Maine's system of numbered state highways, located in York County.

The highway crosses into Kennebunk and runs east into town along the Mousam River.

SR 35 crosses US 1 less than 1⁄4 mile (0.40 km) from this intersection.

Route 99 also passes by Lloid G. Nedeau Memorial Park.

[3] SR 99 has always had its administrative terminus at US 1 in Kennebunk, but its signed eastern terminus was historically located at its intersection with SR 9A west of downtown.