Tennyson Inlet encompasses Duncan Bay to Tawhitinui Reach.

Turn off State highway number six (SH6)at Rai Valley towards French Pass and Tennyson Inlet.

[2] Duncan and Penzance Bay could be accessed in 1960 through Opouri Valley, which is the current route.

Duncan Bay is especially popular because it is the closest place to launch a boat in the Marlborough Sounds from Nelson.

Many baches, or holiday homes are present in this area, permanent resident numbers are low.