This section up to Catons Bay, along with section 5, was opened in May 2006. It also traverses along the old railway embankment until closer to the Little River township. In places where the old railway ballast is loose, a new surface of compacted gravel was installed.
In 2009 the Christchurch City Council (CCC) extended the Railtrail to Kinloch Rd, a few hundred meters from the Little River township. In the long-term the CCC will complete the Railtrail and it will finish opposite the Little River Railway Station (now an information and craft centre) in the township.
Much of this section travels beside Te Roto o Wairewa (Lake Forsyth). The Wairewa Runanga is developing a Mahinga Kai Cultural Park in this area and has established the Takuahi Research and Development Company to oversee this work. This group has been the lead organisation in the development of this section of the Railtrail.
There are toilets at Catons Bay and in the Little River township.