Thornbury Bridge Picnic Area sits alongside the Aparima River in Thornbury, a small Southland settlement about ten minutes north of Riverton off SH99.

Managed by the Southland District Council as part of the Aparima Bridge Reserve, it offers unpowered freedom camping for up to 28 days per calendar year.

The site is a large grassy area shaded by mature trees and is accessible from both sides of the road, though large vehicles cannot pass under the bridge. The reserve is a pleasant spot for swimming, fishing, and relaxing by the river.

Spinning is considered the best fishing method in the morning, with fly fishing favoured during midday.

Pets are welcome but should be kept under close watch, as the Aparima River is recognised by BirdLife International as an Important Bird Area supporting breeding colonies of the Black-billed Gull.